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  1. Gran Valle Qu mica | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectricHydro Electric Co P Ltd Jump to:County2 enGran

  2. The CUORE and CUORE-0 experiments at Gran Sasso

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Giachero, A.; Artusa, D. R.; Avignone, F. T.; Azzolini, O.; Balata, M.; Banks, T. I.; Bari, G.; Beeman, J.; Bellini, F.; Bersani, A.; et al

    2015-05-29

    The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay (0???) in 130Te and other rare processes. CUORE is a cryogenic detector composed of 988 TeO2 bolometers for a total mass of about 741 kg. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/(keV·kg·y) will be reached, in five years of data taking CUORE will have an half life sensitivity around 1 × 1026 y at 90% C.L. As a first step towardsmore »CUORE a smaller experiment CUORE-0, constructed to test and demonstrate the performances expected for CUORE, has been assembled and is running. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.« less

  3. The CUORE and CUORE-0 experiments at Gran Sasso

    SciTech Connect (OSTI)

    Giachero, A.; Artusa, D. R.; Avignone, F. T.; Azzolini, O.; Balata, M.; Banks, T. I.; Bari, G.; Beeman, J.; Bellini, F.; Bersani, A.; Biassoni, M.; Brofferio, C.; Bucci, C.; Cai, X. Z.; Camacho, A.; Caminata, A.; Canonica, L.; Cao, X. G.; Capelli, S.; Cappelli, L.; Carbone, L.; Cardani, L.; Casali, N.; Cassina, L.; Chiesa, D.; Chott, N.; Clemenza, M.; Copello, S.; Cosmelli, C.; Cremonesi, O.; Creswick, R.J.; Cushman, J.S.; Dafinei, I.; Dally, A.; Datskov, V.; Dell’Oro, S.; Deninno, M. M.; Di Domizio, S.; di Vacri, M. L.; Drobizhev, A.; Ejzak, L.; Fang, D. Q.; Farach, H. A.; Faverzani, M.; Fernandes, G.; Ferri, E.; Ferroni, F.; Fiorini, E.; Franceschi, M. A.; Freedman, S. J.; Fujikawa, B. K.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Gutierrez, T. D.; Haller, E. E.; Han, K.; Heeger, K. M.; Hennings-Yeomans, R.; Hickerson, K. P.; Huang, H. Z.; Kadel, R.; Kazkaz, K.; Keppel, G.; Kolomensky, Yu.G.; Li, Y.L.; Ligi, C.; Lim, K. E.; Liu, X.; Ma, Y. G.; Maiano, C.; Maino, M.; Martinez, M.; Maruyama, R. H.; Mei, Y.; Moggi, N.; Morganti, S.; Napolitano, T.; Nastasi, M.; Nisi, S.; Nones, C.; Norman, E. B.; Nucciotti, A.; O’Donnell, T.; Orio, F.; Orlandi, D.; Ouellet, J. L.; Pagliarone, C. E.; Pallavicini, M.; Pattavina, L.; Pavan, M.; Pedretti, M.; Pessina, G.; Pettinacci, V.; Piperno, G.; Pira, C.; Pirro, S.; Pozzi, S.; Previtali, E.; Rampazzo, V.; Rosenfeld, C.; Rusconi, C.; Sala, E.; Sangiorgio, S.; Scielzo, N. D.; Sisti, M.; Smith, A. R.; Taffarello, L.; Tenconi, M.; Terranova, F.; Tian, W. D.; Tomei, C.; Trentalange, S.; Ventura, G.; Vignati, M.; Wang, B. S.; Wang, H. W.; Wielgus, L.; Wilson, J.; Winslow, L. A.; Wise, T.; Woodcraft, A.; Zanotti, L.; Zarra, C.; Zhang, G. Q.; Zhu, B. X.; Zucchelli, S.; Bravina, L.; Foka, Y.; Kabana, S.

    2015-05-29

    The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay (0???) in 130Te and other rare processes. CUORE is a cryogenic detector composed of 988 TeO2 bolometers for a total mass of about 741 kg. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/(keV·kg·y) will be reached, in five years of data taking CUORE will have an half life sensitivity around 1 × 1026 y at 90% C.L. As a first step towards CUORE a smaller experiment CUORE-0, constructed to test and demonstrate the performances expected for CUORE, has been assembled and is running. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.

  4. STRUCTURE AND EMPLACEMENT MECHANISMS OF THE ROQUE NUBLO DEBRIS AVALANCHE, GRAN CANARIA (CANARY ISLANDS)

    E-Print Network [OSTI]

    Belousov, Alexander

    STRUCTURE AND EMPLACEMENT MECHANISMS OF THE ROQUE NUBLO DEBRIS AVALANCHE, GRAN CANARIA (CANARY ISLANDS) Alexander Belousov (1,2), Marina Belousova (1) and Hans-Ulrich Schmincke(2) (1) - Institute

  5. Sustainable vector control and management of Chagas disease in the Gran Chaco, Argentina

    E-Print Network [OSTI]

    Cohen, Joel E.

    Sustainable vector control and management of Chagas disease in the Gran Chaco, Argentina Ricardo E Aires, Argentina; Department of Pathobiology and Center for Zoonoses Research, University of Illinois. Mario Fatala Chaben, Paseo Colo´ n 568, 1032 Buenos Aires, Argentina; and §Laboratory of Populations

  6. Results on Dark Matter and beta beta decay modes by DAMA at Gran Sasso

    E-Print Network [OSTI]

    R. Bernabei

    2007-05-21

    DAMA is an observatory for rare processes and it is operative deep underground at the Gran Sasso National Laboratory of the I.N.F.N. (LNGS). Here some arguments will be presented on the investigation on dark matter particles by annual modulation signature and on some of the realized double beta decay searches.

  7. A low background facility inside the LVD detector at Gran Sasso

    E-Print Network [OSTI]

    Arneodo, F

    2008-01-01

    The Large Volume Detector (LVD) in the Gran Sasso Laboratory of INFN is an observatory mainly devoted to search for neutrinos from core collapse supernovae. It consists of 1000 tons of liquid scintillator divided in 840 stainless steel tanks 1.5m$^3$ each. In this letter we present the possibility for LVD to work both as a passive shield and moderator for the low energy gamma and neutron background and as an active veto for muons and higher energy neutrons. An inner region inside the LVD structure ("LVD Core Facility") can be identified, with a volume of about 30m$^3$, with the neutron background typical of an underground laboratory placed at a much deeper site. This region can be realized with a negligible impact on the LVD operation and sensitive mass. The LVD Core Facility could be effectively exploited by a compact experiment for the search of rare events, such as double beta decay or dark matter.

  8. Measurement of the energy spectrum of underground muons at Gran Sasso with a transition radiation detector

    E-Print Network [OSTI]

    The MACRO Collaboration; M. Ambrosio et al

    1998-07-09

    We have measured directly the residual energy of cosmic ray muons crossing the MACRO detector at the Gran Sasso Laboratory. For this measurement we have used a transition radiation detector consisting of three identical modules, each of about 12 m^2 area, operating in the energy region from 100 GeV to 1 TeV. The results presented here were obtained with the first module collecting data for more than two years. The average single muon energy is found to be 320 +/- 4 (stat.) +/- 11 (syst.) GeV in the rock depth range 3000-6500 hg/cm^2. The results are in agreement with calculations of the energy loss of muons in the rock above the detector.

  9. The XENON10 WIMP Search Experiment at the Gran Sasso Underground Laboratory

    E-Print Network [OSTI]

    Laura Baudis

    2007-03-08

    XENON10 is a new direct dark matter detection experiment using liquid xenon as target for weakly interacting, massive particles (WIMPs). A two-phase (liquid/gas) time projection chamber with 15 kg fiducial mass has been installed in a low-background shield at the Gran Sasso Underground Laboratory in July 2006. After initial performance tests with various calibration sources, the science data run started on August 24, 2006. The detector has been running stably since then, and a full analysis of more than 75 live days of WIMP search data is now in progress. We present first results on gamma and neutron calibration runs, as well as a preliminary analysis of a subset of the WIMP search data.

  10. Regional aeolian dynamics and sand mixing in the Gran Desierto: Evidence from Landsat thematic mapper images

    SciTech Connect (OSTI)

    Blount, G.; Greeley, R.; Christensen, P.R. (Arizona State Univ., Tempe (USA)); Smith, M.O.; Adams, J.B. (Univ. of Washington, Seattle (USA))

    1990-09-10

    Spatial variations in sand composition were mapped on a regional scale in a terrestrial sand sea, the Gran Desierto of Sonora, Mexico. Mesoscale mapping on a satellite image base allowed quantitative interpretation of the dynamic development of sand sheets and dunes. The results were used to interpret the Quaternary geologic history of the tectonically active region at the mouth of the Colorado River. Landsat thematic mapper multispectral images were used to predict the abundance of different mineralogies of sand grains in a mixed aeolian terrain. A spectral mixing model separated the effects of vegetation and topographically induced shading and shadow from the effects produced by different mineral and rock types. Compositions determined remotely agreed well with samples from selected areas within the spectral limitations of the thematic mapper. A simple discrimination capability for active versus inactive sand surfaces is demonstrated based upon differences in the percentage of low-albedo accessory grains occurring on dormant aeolian surfaces. A technique for discriminating between low-albedo materials and macroscopic shade is implemented by combing thermal images with the results of the spectral mixing model. The image analysis revealed important compositional variations over large areas that were not readily apparent in the field.

  11. First results from the DarkSide-50 dark matter experiment at Laboratori Nazionali del Gran Sasso

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Agnes, P.

    2015-03-11

    We report the first results of DarkSide-50, a direct search for dark matter operating in the underground Laboratori Nazionali del Gran Sasso (LNGS) and searching for the rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The dark matter detector is a Liquid Argon Time Projection Chamber with a (46.4 ± 0.7) kg active mass, operated inside a 30 t organic liquid scintillator neutron veto, which is in turn installed at the center of a 1 kt water Cherenkov veto for the residual flux of cosmic rays. We report here the null results of a dark matter searchmore »for a (1422 ± 67) kgd exposure with an atmospheric argon fill. This is the most sensitive dark matter search performed with an argon target, corresponding to a 90% CL upper limit on the WIMP-nucleon spin-independent cross section of 6.1×10??? cm² for a WIMP mass of 100 Gev/c² .« less

  12. C2GT intercepting CERN neutrinos to Gran Sasso in the Gulf of Taranto to measure $\\theta_13$

    E-Print Network [OSTI]

    Ball, A E; Camilleri, L L; Catinaccio, A; Chelkov, G A; Dydak, F; Elagin, A; Frandsen, Poul Kjaer; Gostkin, M I; Grant, A; Guskov, A; Joram, C; Krumshtein, Z; Müller, H; Postema, H; Price, M; Rovelli, T; Schinzel, D; Séguinot, Jacques; Valenti, G; Voss, R; Wotschack, J; Zhemchugov, A S

    2007-01-01

    Today's greatest challenge in accelerator-based neutrino physics is to measure the mixing angle \\thonethree\\ which is known to be much smaller than the solar mixing angle \\thonetwo\\ and the atmospheric mixing angle \\thtwothree . A non-zero value of the angle \\thonethree\\ is a prerequisite for observing CP violation in neutrino mixing. In this paper, we discuss a deep-sea neutrino experiment with 1.5~Mt fiducial target mass in the Gulf of Taranto with the prime objective of measuring \\thonethree. The detector is exposed to the CERN neutrino beam to Gran Sasso in off-axis geometry. Monochromatic muon-neutrinos of $\\approx 800$~MeV energy are the dominant beam component. Neutrinos are detected through quasi-elastic, charged-current reactions in sea water; electrons and muons are detected in a large-surface, ring-imaging Cherenkov detector. The profile of the seabed in the Gulf of Taranto allows for a moveable experiment at variable distances from CERN, starting at 1100 km. From the oscillatory pattern of the dis...

  13. El otro "gran" Itziar Aretxaga, INAOE

    E-Print Network [OSTI]

    Aretxaga, Itziar

    luz proveniente de los objetos celestes, se optó por un diseño de espejo segmentado, que es mucho más dispositivos de posicionamiento (3 por hexágono) para corregir la colocación de los segmentos. La luz reflejada primario, y que dirige la luz a los instrumentos de registro. Un telescopio no es nada sin sus instrumentos

  14. Time-Shift in the OPERA set-up: proof against superluminal neutrinos without the need of knowing the CERN-LNGS distance and Reminiscences on the origin of the Gran Sasso Lab, of the 3rd neutrino and of the "Teramo Anomaly"

    E-Print Network [OSTI]

    Antonino Zichichi

    2012-06-13

    The LVD time stability allows to establish a time-shift in the OPERA experiment, thus providing the first proof against Superluminal neutrinos, using the horizontal muons of the "Teramo Anomaly". This proof is particularly interesting since does not need the knowledge of the distance between the place where the neutrinos are produced (CERN) and the place where they are detected (LNGS). Since the Superluminal neutrinos generated in the physics community a vivid interest in good and bad behaviour in physics research, the author thought it was appropriate to recall the origin of the Gran Sasso Lab, of the 3rd neutrino, of the horizontal muons due to the "Teramo Anomaly" and of the oscillation between leptonic flavours, when the CERN-Gran Sasso neutrino beam was included in the project for the most powerful underground Laboratory in the world.

  15. Actuar en asociacin Regin del Gran Atlas, Marruecos

    E-Print Network [OSTI]

    Jóvenes equipos «del Sur» apoyados por el Instituto América Latina · Desarrollo sustentable en Amazonia

  16. The CUORE and CUORE-0 Experiments at Gran Sasso

    E-Print Network [OSTI]

    Giachero, A; Avignone, F T; Azzolini, O; Balata, M; Banks, T I; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Brofferio, C; Bucci, C; Cai, X Z; Camacho, A; Caminata, A; Canonica, L; Cao, X G; Capelli, S; Cappelli, L; Carbone, L; Cardani, L; Casali, N; Cassina, L; Chiesa, D; Chott, N; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, R J; Cushman, J S; Dafinei, I; Dally, A; Datskov, V; Dell'Oro, S; Deninno, M M; Di Domizio, S; di Vacri, M L; Drobizhev, A; Ejzak, L; Fang, D Q; Farach, H A; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Fujikawa, B K; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Gutierrez, T D; Haller, E E; Han, K; Heeger, K M; Hennings-Yeomans, R; Hickerson, K P; Huang, H Z; Kadel, R; Kazkaz, K; Keppel, G; Kolomensky, Yu G; Li, Y L; Ligi, C; Lim, K E; Liu, X; Ma, Y G; Maiano, C; Maino, M; Martinez, M; Maruyama, R H; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nastasi, M; Nisi, S; Nones, C; Norman, E B; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, J L; Pagliarone, C E; Pallavicini, M; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Pettinacci, V; Piperno, G; Pira, C; Pirro, S; Pozzi, S; Previtali, E; Rampazzo, V; Rosenfeld, C; Rusconi, C; Sala, E; Sangiorgio, S; Scielzo, N D; Sisti, M; Smith, A R; Taffarello, L; Tenconi, M; Terranova, F; Tian, W D; Tomei, C; Trentalange, S; Ventura, G; Vignati, M; Wang, B S; Wang, H W; Wielgus, L; Wilson, J; Winslow, L A; Wise, T; Woodcraft, A; Zanotti, L; Zarra, C; Zhang, G Q; Zhu, B X; Zucchelli, S

    2015-01-01

    The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay ($0\

  17. Mor-Gran-Sou Electric Coop Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII Jump to: navigation, searchsource History ViewMoeOhio: EnergyMoonMoose

  18. Prof. Dr. Gran Andersson, Director of Studies 03/10/14MEST 1

    E-Print Network [OSTI]

    Daraio, Chiara

    * Switzerland,*10* S.Korea,*1* Egypt,*1* China,*1* Austria, 1 Finland, 1 Germany, 5 Greece, 4 Italy, 1 Spain, 1. Andersson, D-ITET) § Electric Power Systems (Prof. Ch. Franck, D-ITET) § Energy Economics and Policy (Prof. Poulikakos Power electronics Prof. Biela Prof. Kolar Energy for personal and freight transportation Prof

  19. Interfaces cerebro-mquina, un gran paso hacia la Inteligencia Artificial Jess Corts

    E-Print Network [OSTI]

    Cortes, Jesus

    de todos los sistemas cerebro-máquina es la misma. Después de la implantación de electrodos en alguna eléctricos sean fiables y unívocamente interpretados se necesitan electrodos pequeños que permiten medir la están implantando bio-electrodos, con lo que se consiguen registros estables incluso durante varios

  20. La Universidad de Princeton es una comunidad acadmica de gran dina-

    E-Print Network [OSTI]

    Rowley, Clarence W.

    Comunicación Intercultural Oferta académica #12;Estudiar en una escuela de artes liberales es una experiencia solidez de una importante institución de investigación y las características de una excepcional escuela de artes liberales. #12;Los estudiantes de grado son nuestra prioridad En Princeton, todos los profesores

  1. EVAcon: a protein contact prediction evaluation Osvaldo Gran~a, Volker A. Eyrich1

    E-Print Network [OSTI]

    Pazos, Florencio

    , Florencio Pazos, Burkhard Rost1 and Alfonso Valencia* Protein Design Group, Centro Nacional de Biotecnologia

  2. Mdulo II.-Amenazas para la biodiversidad l La sexta gran extincin

    E-Print Network [OSTI]

    Rey Benayas, José María

    invernadero, aprox. 2/3 con las indirectas #12;n Los antecedentes de extinción de especies por efectos and IPCC 2007 Supone el 12% del total global de emisiones antrópicas directas de gases de efecto

  3. First results from a Dark Matter search with liquid Argon at 87 K in the Gran Sasso Underground Laboratory

    E-Print Network [OSTI]

    Benetti, P; Adamo, F; Baibussinov, B; Baldo-Ceolin, M; Belluco, M; Calaprice, F; Calligarich, E; Cambiaghi, M; Carbonara, F; Cavanna, F; Centro, Sandro; Cocco, A G; Di Pompeo, F; Ferrari, N; Fiorillo, G; Galbiati, C; Gallo, V; Grandi, L; Ianni, A; Mangano, G; Meng, G; Montanari, C; Palamara, O; Pandola, L; Pietropaolo, F; Raselli, G L; Rossella, M; Rubbia, C; Szelc, A M; Ventura, Sandro; Vignoli, C; 10.1016/j.astropartphys.2007.08.002

    2008-01-01

    A new method of searching for dark matter in the form of weakly interacting massive particles (WIMP) has been developed with the direct detection of the low energy nuclear recoils observed in a massive target (ultimately many tons) of ultra pure Liquid Argon at 87 K. A high selectivity for Argon recoils is achieved by the simultaneous observation of both the VUV scintillation luminescence and of the electron signal surviving columnar recombination, extracted through the liquid-gas boundary by an electric field. First physics results from this method are reported, based on a small 2.3 litre test chamber filled with natural Argon and an accumulated fiducial exposure of about 100 kg x day, supporting the future validity of this method with isotopically purified 40Ar and for a much larger unit presently under construction with correspondingly increased sensitivities.

  4. Hijos de la Gran Guerra: The Creation of the Mexican American Identity in Texas, 1836-1929 

    E-Print Network [OSTI]

    Morales, Ralph Edward

    2015-05-12

    that were being contested during the Civil War or that they were uninterested in a new national identity. The most famous Tejano to serve during the American Civil War, Santos Benavides, was an active political figure 8 Neil Foley, “Becoming Hispanic...

  5. A small and effective data cache for real-time multitasking systems Juan Segarra, Clemente Rodriguez, Ruben Gran, Luis C. Aparicio and Victor Vi~nals

    E-Print Network [OSTI]

    Zaragoza, Universidad de

    -60625 and TIN2010- 21291-C02-01 (Spanish Government and European ERDF), gaZ: T48 research group (Arag´on Government and European ESF), Consolider CSD2007-00050 (Spanish Government), and HiPEAC-2 NoE (European FP7

  6. En Medio De Un Gran Circo: La Ciudad De México A Tráves De Las Crónicas Musicales De Maldita Vecindad Y Los Hijos Del 5º Patio

    E-Print Network [OSTI]

    Lujan, Soledad

    2014-01-01

    haber nacido durante un terremoto. La letra de la canciónmuestran la destrucción del terremoto en la ciudad de manerapolítica y cambio social: El terremoto del 19 de septiembre

  7. F.M. Brouwer R.L.M. Vissers W.M. Lamb Structure and metamorphism of the Gran Paradiso massif,

    E-Print Network [OSTI]

    Brouwer, Fraukje M.

    during initial decompression, while undergoing top-to-the-west shear on chlorite-bearing shear bands and larger scale shear zones. Biotite-bearing shear bands and larger shear zones related to top Paradiso (Meffan-Main, personal communication), Dora Maira (Tilton et al. 1989; Gebauer et al. 1993

  8. R. Winther, B.A. Gran, and G. Dahll (Eds.): SAFECOMP 2005, LNCS 3688, pp. 136 150, 2005. Springer-Verlag Berlin Heidelberg 2005

    E-Print Network [OSTI]

    Kelly, Tim

    . © Springer-Verlag Berlin Heidelberg 2005 Using Safety Critical Artificial Neural Networks in Gas Turbine Aero-Engine networks. This paper examines the practicalities of using the SCANN and SLANN for Gas Turbine Aero-Engine arguments. Results illustrating the benefits and safety of the SCANN in a Gas Turbine Engine Model

  9. En Medio De Un Gran Circo: La Ciudad De México A Tráves De Las Crónicas Musicales De Maldita Vecindad Y Los Hijos Del 5º Patio

    E-Print Network [OSTI]

    Lujan, Soledad

    2014-01-01

    25 “rola” de Arcaraz El urbanismo cotidiano de la Ciudad de9). La teoría de un urbanismo cotidiano es adecuada parasólo se puede imaginar. El urbanismo cotidiano de la Ciudad

  10. Age determined from the daily deposition of concentric rings on common octopus

    E-Print Network [OSTI]

    Las Palmas de Gran Canaria Apdo. 550, Las Palmas de Gran Canaria Canary Islands, Spain E and May 1999, from catches of the small-scale fishery off the island of Gran Canaria (The Canary Islands

  11. 04/09/13 The US-Italy Physics Program at Laboratori Nazionali del Gran Sasso (LNGS) (15 October 2013) https://agenda.infn.it/conferenceOtherViews.py?fr=no&showSession=all&detailLevel=contribution&confId=6760&view=standard&showDate=all 1/1

    E-Print Network [OSTI]

    ' Speaker: Giovanni De Lellis (Università degli Studi di Napoli "Federico II") 16:20 Neutrinoless Double Beta Decay16:40 18:00 NEXT 20' Speaker: J. J. Gomez cadenac (Instituto de Fisica Corpuscolar valencia

  12. UNIVERSIDAD DE ALCAL Departamento de Automtica

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    , Francisco Javier Ceballos y Sebastián Sánchez que me han brindado un gran apoyo desde que llegué a este

  13. Production, characterization and operation of $^{76}$Ge enriched BEGe detectors in GERDA

    E-Print Network [OSTI]

    M. Agostini; M. Allardt; E. Andreotti; A. M. Bakalyarov; M. Balata; I. Barabanov; N. Barros; L. Baudis; C. Bauer; N. Becerici-Schmidt; E. Bellotti; S. Belogurov; S. T. Belyaev; G. Benato; A. Bettini; L. Bezrukov; T. Bode; D. Borowicz; V. Brudanin; R. Brugnera; D. Budjas; A. Caldwel; C. Cattadori; A. Chernogorov; V. D'Andrea; E. V. Demidova; A. Domula; V. Egorov; R. Falkenstein; K. Freund; N. Frodyma; A. Gangapshev; A. Garfagnini; C. Gotti; P. Grabmayr; V. Gurentsov; K. Gusev; W. Hampel; A. Hegai; M. Heisel; S. Hemmer; G. Heusser; W. Hofmann; M. Hult; L. V. Inzhechik; L. Ioannucci; J. Janicsko Csathy; J. Jochum; M. Junker; V. Kazalov; T. Kihm; I. V. Kirpichnikov; A. Kirsch; A. Klimenko; K. T. Knöpfle; O. Kochetov; V. N. Kornoukhov; V. V. Kuzminov; M. Laubenstein; A. Lazzaro; V. I. Lebedev; B. Lehnert; H. Y. Liao; M. Lindner; I. Lippi; A. Lubashevskiy; B. Lubsandorzhiev; G. Lutter; C. Macolino; B. Majorovits; W. Maneschg; M. Misiaszek; I. Nemchenok; S. Nisi; C. O'Shaughnessy; D. Palioselitis; L. Pandola; K. Pelczar; G. Pessina; A. Pullia; S. Riboldi; N. Rumyantseva; C. Sada; M. Salathe; C. Schmitt; J. Schreiner; O. Schulz; B. Schwingenheuer; S. Schönert; E. Shevchik; M. Shirchenko; H. Simgen; A. Smolnikov; L. Stanco; H. Strecker; C. A. Ur; L. Vanhoefer; A. A. Vasenko; K. von Sturm; V. Wagner; M. Walter; A. Wegmann; T. Wester; H. Wilsenach; M. Wojcik; E. Yanovich; P. Zavarise; I. Zhitnikov; S. V. Zhukov; D. Zinatulina; K. Zuber; G. Zuzel

    2014-10-03

    The GERmanium Detector Array (GERDA) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay (0{\

  14. 87/L4/ZALO 88288 2A26L93379 EIN: 54 -5001-758

    E-Print Network [OSTI]

    Hammack, Richard

    statutory or administrative l-imitations and apply to a given granE, contract or other agreement only

  15. Evolution and Origins of Polyploid Sonchus (Subgenus Sonchus) and the Woody Sonchus Alliance

    E-Print Network [OSTI]

    Yao, Li

    2010-01-01

    Ibarrola, E. 1993. Geochronology de la isla de El Hierro (H. U. 1976-1977. Geochronology of Gran Canaria, Canary

  16. Ciudad y México, en la obra literaria de José Joaquín Blanco : arquitectura discursiva y cartografía literaria en la transición neoliberal

    E-Print Network [OSTI]

    Martell, Carlos Jaime

    2012-01-01

    pensamientos, nuestros actos reflejos y hasta los másde su ser. En Blanco, los reflejos luminosos, neónicos, nosus contornos”, pero aquí son reflejos materiales de la gran

  17. Anisotropic Regularization of Posterior Probability Maps Using Vector Space

    E-Print Network [OSTI]

    . Ruiz-Alzola1,2 1 Centro de Tecnolog´ia M´edica Universidad de Las Palmas de Gran Canaria and Hospital

  18. Atmos. Chem. Phys., 3, 797812, 2003 www.atmos-chem-phys.org/acp/3/797/ Atmospheric

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    the limiting growth factor in spring and summer in coastal waters such as the Katte- gat Strait (Gran´eli, 1987

  19. PERCEPTUAL COLOR SPACES FOR COMPUTER GRAPHICS Gary W. Meyer and Donald P. Greenberg

    E-Print Network [OSTI]

    Meyer, Gary

    is gran=ed provided that the copies are not made or distributed for direct com~aerclaladvantage, the A(~4

  20. POSTDOCTORAL RESEARCH ASSOCIATE Weak Interactions Group

    E-Print Network [OSTI]

    Devoret, Michel H.

    double beta decay experiment under construction at Gran Sasso National&D for a future South Pole deployment. CUORE is a cryogenic bolometer-based neutrinoless

  1. Ciudad y México, en la obra literaria de José Joaquín Blanco : arquitectura discursiva y cartografía literaria en la transición neoliberal

    E-Print Network [OSTI]

    Martell, Carlos Jaime

    2012-01-01

    central de esta tesis: los artefactos cartográficos, elsujetos. Gran parte de esta tesis se enfoca en investigar ycomo veremos en esta tesis, la importancia del parcelamiento

  2. REDACCIN | Un equipo de cien-tficos de la Universidad de Lei-

    E-Print Network [OSTI]

    leer lo que ve el paciente en su actividad neuronal tiene un gran poten- cial clínico. Por ejemplo exterior o para desarrollar pró- tesis controladas

  3. Tax Credits, Rebates & Savings | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Wind Incentive Program - Community-Scale Wind Initiative the Massachusetts Clean Energy Center (MassCEC) offers site assessment grants of services, feasibility study gran......

  4. Complex origins of the Lusitania biogeographic province and northeastern Atlantic fishes

    E-Print Network [OSTI]

    2013-01-01

    and Gran Canaria (Canary Islands).  Bulle? tin of Azores, Madeira,  the  Canary  Islands,  Cape  Verde  and Azores, Madeira and the Canary Islands.   Recently,  Briggs 

  5. Neural Cost Functions and Search Strategies for the Generation of Block Designs

    E-Print Network [OSTI]

    Torras, Carme

    Neural Cost Functions and Search Strategies for the Generation of Block Designs: an Experimental Evaluation Pau Bo ll Departament d'Arquitectura de Computadors (UPC), Campus Nord- Modul-D6, c/ Gran Capita s-UPC), Edi ci Nexus, c/ Gran Capita 2-4, 08034 Barcelona, ctorras@iri.upc.es Abstract A constraint

  6. Extended Abstract Ocean Optics XIV, 10.-13. November 1998 COMPARISON OF UNDERWATER LIGHT FIELD PARAMETERIZATIONS AND

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    °30'W) north of Gran Canaria, Canary Islands. It dis- cusses the typical winter and spring situation-Series in the Ocean Canary Islands (ESTOC) is located 60 nautical miles north of Gran Canaria and Tenerife (29°10'N are done as a part of the European CANIGO project (Canary Islands Azores Gibraltar Observation). The ex

  7. El realismo mágico y la teología de la liberación: Una agenda en común frente a los discursos europeos de secularización y secularismo

    E-Print Network [OSTI]

    Poggi, Alfredo Ignacio

    2015-01-01

    realismo mágico junto a Asturias y Carpentier; pero otrosde maíz de Miguel Ángel Asturias, publicadas en 1949. 1 PorCarpentier, Miguel Ángel Asturias y en gran medida Gabriel

  8. Battaglie navali, scorrerie corsare e politica dello spettacolo: Le Naumachie medicee del 1589

    E-Print Network [OSTI]

    Alberti, Maria

    2010-01-01

    Gran Duca Ferdinando I (1588- Pisa, Archivio di Stato (ASP):Ricordi de la Comunità di Pisa. Santo Stefano, filze 58 eStefano e il mare, 19-30. Pisa: ETS, 2001. _____. Un altro

  9. En busca de la solidaridad: feminismo y nación en el Caribe hispano, 1880-1940

    E-Print Network [OSTI]

    Ortiz-Loyola, Brenda

    2013-01-01

    conocimiento y su gran oratoria le ganaron el respeto de losreseñaban el poder de oratoria y la energía desplegada poren un elemento más del oratoria populista asumida por Luis

  10. UNIVERSIDAD AUTNOMA DE MADRID ESCUELA POLITCNICA SUPERIOR

    E-Print Network [OSTI]

    Bellogin, Alejandro

    experimentado un gran crecimiento gracias a la masificación de Internet. Estas han sido objeto de estudio por service with headquarters in the U.S and its basic feature is that its text messages are limited to 140

  11. IMPLICATION FOR THE CORE-COLLAPSE SUPERNOVA RATE FROM 21 YEARS OF DATA OF THE LARGE VOLUME DETECTOR

    E-Print Network [OSTI]

    Pless, Irwin A.

    The Large Volume Detector (LVD) has been continuously taking data since 1992 at the INFN Gran Sasso National Laboratory. The LVD is sensitive to neutrino bursts from gravitational stellar collapses with full detection ...

  12. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 2011; 00:123

    E-Print Network [OSTI]

    Buscaglia, Gustavo C.

    Barcelona, Espa~na SUMMARY In this work, a new enrichment space to accomodate jumps in the pressure field/ Gran Capit´an S/N 08034 Barcelona, Espa~na Copyright c 2011 John Wiley & Sons, Ltd. Prepared using

  13. Cerrar la Brecha de Fluidez Mitchel Resnick

    E-Print Network [OSTI]

    Resnick, Mitchel

    , Martin, Sargent, & Silverman, 1996). Con estos ladrillos, ellos pueden darle a sus construcciones físicas colegiales han usado nuestros ladrillos programables para diseñar una gran variedad de construcciones

  14. Geophysical Journal International Geophys. J. Int. (2015) 202, 787799 doi: 10.1093/gji/ggv183

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    2015-01-01

    in Bratislava, Mlynsk´a dolina F1, 84248 Bratislava, Slovakia 3Institute of Geophysics, Academy of Sciences & Engineering, Barcelona Supercomputing Centre, Carrer del Gran Capit´a 2-4, Barcelona, Spain Accepted 2015

  15. Boletn de la Sociedad Entomolgica Aragonesa (S.E.A.), n 46 (2010) : 429435. APHELOCHEIRUS MURCIUS NIESER & MILLN, 1989 Y

    E-Print Network [OSTI]

    Murcia, Universidad de

    2010-01-01

    ambientales. Todo ello confiere un alto interés de conservación a la gran parte de la biodiversidad que alberga este tipo de ecosistemas fluviales. Dentro de esta biodiversidad destacan las especies del género

  16. Curriculum Vitae. Dr. Andrew Peter Vovides Papalouka EXPEDIENTE 4598

    E-Print Network [OSTI]

    Vovides, Andrew Peter - INECOL

    . Universidad de Gales, Cardiff, Gran Bretaña. 07/1975 1994 Curso/estancia de especialización; Desarrollo y Amenazadas por medio de uso sostenible en Mexico. 12/1995-12/98. 3.2.8 CONABIO (B-140) Investigador principal

  17. Fermilab | Newsroom | Press Releases | April 22, 2015: Icarus...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JPG images. When using these images, please credit each photo as indicated. Med Res | Hi Res A view of the top of the ICARUS detector in place at INFN's Gran Sasso National...

  18. Novick, A., "Pasado, presente; local y global", en Fernando Cacopardo, Ma. Liliana da Orden y Elisa Pastoriza. Pasado y presente de la Mar del Plata Social. Mar del Plata. EUDEM

    E-Print Network [OSTI]

    Richner, Heinz

    pasado no es de gran ayuda para la toma de decisiones. Como sabemos desde la experiencia de los Annales corriente latinoamericana que tuvo en la revolución cubana su epicentro, y a la que se fueron sumando

  19. para estudiantes extranjeros

    E-Print Network [OSTI]

    Cardeñosa, Jesús

    los intercambios de estudiantes en todos los niveles de grado y postgrado. Por esta razón los exagerado afirmar que gran parte de la historia de la tecnología española de más de siglo y medio ha sido Superiores que hasta e

  20. Recent results in neutrino physics

    E-Print Network [OSTI]

    Valle, José W F

    1994-01-01

    Invited Talk at {\\sl ICNAPP}, Bangalore, India, Jan. 1994; {\\sl Int. School on Cosmological Dark Matter}, Valencia, Oct. 1993; and Gran Sasso meeting on {\\sl Solar Neutrino Problem: astrophysics or oscillations?}, march 1994.

  1. Festival Report: X Festival Iberoamericano de Teatro de Cádiz

    E-Print Network [OSTI]

    Reverte Bernal, Concepció n

    1996-04-01

    significativos: el Club de la Serpiente, la muerte de Rocamadour, Moreili, etc. La estratégica colocación de elementos escenográficos y el juego de luces indican los saltos espacio-temporales; la actuación es muy buena. La adaptación ha obtenido gran éxito en... significativos: el Club de la Serpiente, la muerte de Rocamadour, Moreili, etc. La estratégica colocación de elementos escenográficos y el juego de luces indican los saltos espacio-temporales; la actuación es muy buena. La adaptación ha obtenido gran éxito en...

  2. Apuntes sobre 'Fulgor y muerte de Joaquín Murieta' de Pablo Neruda

    E-Print Network [OSTI]

    Droguett, Ivá n

    1968-10-01

    texto, por ser expresiones de significado muy gen eral y equívoco. Por ejemplo: aurora, que significa un momento del día, en el sintagma: "ha llegado la hora de una gran aurora" expresa la esperanza de triunfar contra USA en un conflicto armado. De... texto, por ser expresiones de significado muy gen eral y equívoco. Por ejemplo: aurora, que significa un momento del día, en el sintagma: "ha llegado la hora de una gran aurora" expresa la esperanza de triunfar contra USA en un conflicto armado. De...

  3. Presente, futuro y teatro costarricense

    E-Print Network [OSTI]

    Bonilla, Marí a

    1992-04-01

    preocupado hasta hace un año—cerrados desde entonces debido a las consecuencias del terremoto del 22 de diciembre de 1990--por mantener al menos una producción anual de un gran espectáculo. De escogencia de su Junta Directiva, contratan al equipo necesario... preocupado hasta hace un año—cerrados desde entonces debido a las consecuencias del terremoto del 22 de diciembre de 1990--por mantener al menos una producción anual de un gran espectáculo. De escogencia de su Junta Directiva, contratan al equipo necesario...

  4. Geology of the South Mason County area, Texas 

    E-Print Network [OSTI]

    Alexander, William Luther

    1952-01-01

    . . . . . . . . . . . . . . . . . . . . ~ . . fol1owing page 26 V, Fig. 1& Schist intruded into gneiss ~. . . . . . fo~ Fig, 2t Sharp contact between schist and intruded gneiss . . . . . . . . . , . . . . , . ?, following page 26 page 26 VI, Fig, 1: Gran1te quarry south of Mason... . . . ~ . Fig, 2s Eroded gran1te 1n quarry south of Mason, . . ~ f ollow1ng page 27 VII, Ve1n quartz in schist ~ VIII, Nassive quartz . . . . following page ~ ~ ~ following page 2S IX. Coarse-grained Hickory sandstone at prs Cambl fan contact...

  5. Entrevista con José Ramón Enríquez

    E-Print Network [OSTI]

    Loisel, Clary

    2002-10-01

    opresivo, la comparto con mucha gente en muchos sitios. Ese poder hoy se encarna en el neoliberalismo, que es el gran enemigo. Vivo en un país enormemente dolido, explotado en todos los sentidos. Formo parte de una minoría que tiene sus características... opresivo, la comparto con mucha gente en muchos sitios. Ese poder hoy se encarna en el neoliberalismo, que es el gran enemigo. Vivo en un país enormemente dolido, explotado en todos los sentidos. Formo parte de una minoría que tiene sus características...

  6. Consideraciones sobre encuentro y evasión en la cartelera porteña

    E-Print Network [OSTI]

    Montes-Huidobro, Matí as

    1990-04-01

    la pena - toda una entrega. Todo esto está en los personajes de Discépolo que no se avergüenzan de su verdad y la comparten con nosotros. Este afán de comunicabilidad es la mecánica interna de la acción dramática de Cremona y su gran acierto. Si a... la pena - toda una entrega. Todo esto está en los personajes de Discépolo que no se avergüenzan de su verdad y la comparten con nosotros. Este afán de comunicabilidad es la mecánica interna de la acción dramática de Cremona y su gran acierto. Si a...

  7. Dos tardes con Carlos Solórzano

    E-Print Network [OSTI]

    Mé ndez-Faith, Teresa

    1984-10-01

    particular. En cuanto a la presencia de Albert Camus—cuya personalidad era fascinante y envolvente; era una personalidad total, de pensador, de poeta, de gran prosista—, él, en suma, no era más que el resultado de todo un ambiente cultural escéptico que... cuanto a Albert Camus y a Michel de Ghelderode—a quien conocí personalmente—, ambos recogían de alguna manera la herencia hispánica y por eso siempre sentí una gran afinidad por ellos. Tanto Camus como Ghelderode—sobre todo éste, con su mundo...

  8. Siempre hubo clases: clases medias y modernización en la literatura hispánica decimonónica

    E-Print Network [OSTI]

    Gomis-Izquierdo, Vicente

    2008-01-02

    Esta tesis se centra en el estudio de tres novelas del sigo XIX de tres países diferentes. Suprema ley de Federico Gamboa es de México, La gran aldea de Lucio Vicente López, de Argentina, y Fortunata y Jacinta de Benito Pérez Galdós de España. El...

  9. Quantifying the Benefits of Resource Multiplexing in OnDemand Data Centers #

    E-Print Network [OSTI]

    Chandra, Abhishek

    centers host multiple applications on server farms by dynamically provisioning resources in response is dependent on several factors --- the gran­ ularity and frequency of reallocation, the number of applications and storage resources. In such environments, customers pay for data center resources and in turn are provided

  10. Quantifying the Benefits of Resource Multiplexing in On-Demand Data Centers

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    centers host multiple applications on server farms by dynamically provisioning resources in response is dependent on several factors -- the gran- ularity and frequency of reallocation, the number of applications and storage resources. In such environments, customers pay for data center resources and in turn are provided

  11. Kennedy Krieger institute Aviso sobre prcticas de privacidad

    E-Print Network [OSTI]

    Pevsner, Jonathan

    Kennedy Krieger institute Aviso sobre prácticas de privacidad El presente aviso describe cómo puede nacemos con gran potencial. ¿No deberíamos tener todos la oportunidad de alcanzarlo? Kennedy Krieger Privacidad del Kennedy Krieger Institute como se explica al final de este aviso. También esta disponible en

  12. Algoritmos y Estructuras de Datos Ingeniera en Informtica, Curso 2

    E-Print Network [OSTI]

    Giménez, Domingo

    Contenidos: 1. Características generales de C 2. Edición y compilación de un programa C 3. Variables y tipos de datos básicos 4. Operadores 5. Sentencias de control de flujo Ejercicios #12;Algoritmos y gran potencia y expresividad. · Tipos de datos elementales: enteros (int, long, short), caracteres

  13. RU Rtport Nb. 130 Danish Atomic Energy Commission

    E-Print Network [OSTI]

    in drinking water 69 5. 9. E8timate_of_the Mean_Contents_of ,Sr^0_and_Cs-137 in the_HumrøI)iet_to_p5Junark of precipitation, soil, ground water, sea water, gran, dried milk, fresh milk, grain, bread, potatoes, vegetables, fruit, total diet, drinking water, and human bone. Furthermore Sr-90 was determined in local samples

  14. Nuevas ventanas inteligentes con transmisin de luz controlada basadas en tecnologas de coste muy bajo, para aplicaciones en fachada interior o exterior

    E-Print Network [OSTI]

    bajos costes de fabricación. Se buscan socios industriales para licenciar la patente y explotar la recursos energéticos en los edificios. La simple y fácil preparación (Materiales no basados en LC) del dispositivo hace que los costes de fabricación sean bajos, con la gran ventaja de usar materiales más baratos

  15. 'Naked' Crystals go Underground

    E-Print Network [OSTI]

    Hans Volker Klapdor-Kleingrothaus

    2003-07-26

    On May 5, 2003 in the GRAN SASSO Underground Laboratory the first naked high-purity Germanium detectors were installed successfully in liquid nitrogen in the GENIUS-Test-Facility (GENIUS-TF). This is the first time ever that this novel technique for extreme background reduction in searches for rare decays is going to be tested under realistic background conditions.

  16. First 10 kg of Naked Germanium Detectors in Liquid Nitrogen installed in the GENIUS-Test-Facility

    E-Print Network [OSTI]

    H. V. Klapdor-Kleingrothaus; O. Chkvorez; I. V. Krivosheina; H. Strecker; C. Tomei

    2003-09-15

    The first four naked high purity Germanium detectors were installed successfully in liquid nitrogen in the GENIUS-Test-Facility (GENIUS-TF) in the GRAN SASSO Underground Laboratory on May 5, 2003. This is the first time ever that this novel technique aiming at extreme background reduction in search for rare decays is going to be tested underground. First operational parameters are presented.

  17. Master of Business Administration

    E-Print Network [OSTI]

    educativo en Europa y en todo el mundo. Su filosofía propia y su modelo basado en la excelencia la convierten en una universidad referente e innovadora. Sus indicadores en docencia, investigación e explorar y entender la naturaleza profunda de las cosas y los conceptos. Exige, además, un gran afán de

  18. Windows beyond the Standard Model

    SciTech Connect (OSTI)

    Bernabei, R.

    2007-10-12

    DAMA is an observatory for rare processes at the Gran Sasso National Laboratory of the I.N.F.N. (LNGS). Here some arguments will be shortly summarised on the investigation on dark matter (DM) particles by annual modulation signature and on some of the performed searches for double beta decay modes.

  19. Solving TCP Incast in Cluster Storage Systems Vijay Vasudevan*, Hiral Shah*, Amar Phanishayee*, Elie Krevat

    E-Print Network [OSTI]

    retransmission (RTO) duration by three orders of magnitude, from 200ms down to microseconds. Previous work-grained timers and cannot reduce the RTO enough to avoid Incast; standard TCP implementations do not keep track of concurrent senders in a synchro- nized TCP request. Reducing RTO to microsecond gran- ularity alleviates

  20. Arquitectura Multiagente para la Gestin de Informacin de Awareness en Entornos CSCL

    E-Print Network [OSTI]

    Guerrero, Luis

    Arquitectura Multiagente para la Gestión de Información de Awareness en Entornos CSCL Iván D colaboración asistidos por computadora o CSCL, gran parte del conocimiento que fluye durante la dinámica esta razón, este artículo presenta una Arquitectura Multiagentes como alternativa para la gestión de

  1. Toxic Effects of Spinosad on Predatory Insects Juan Cisneros,* Dave Goulson, Lara C. Derwent, Dora I. Penagos,* Olivia Hernandez,*

    E-Print Network [OSTI]

    .P. 36, Tapachula, Chiapas 30700, Mexico; and Biological Sciences, University of Southampton, Southampton to insect natural enemies. We assessed the impact of Spinosad in a gran- ular maize-flour formulation cannot be considered to have an environmental safety profile similar to most estab- lished biological

  2. SECONDARY CIRCULATION IN GRANULAR FLOW THROUGH NONAXISYMMETRIC HOPPERS

    E-Print Network [OSTI]

    25 1. Introduction. In manufacturing industries, raw materials are stored in gran- ular form. MATTHEWS, AND DAVID G. SCHAEFFER Abstract. Jenike's radial solution, widely used in the design of materials of granular material through an infinite, right-circular cone. In this paper we study how the geometry

  3. SECONDARY CIRCULATION IN GRANULAR FLOW THROUGH NONAXISYMMETRIC HOPPERS

    E-Print Network [OSTI]

    25 1. Introduction. In manufacturing industries, raw materials are stored in gran­ ular form of materials­handling equipment, is a similarity solution of steady­state continuum equations for the flow under gravity of granular material through an infinite, right­circular cone. In this paper we study how

  4. INFLATABLE PLUG FOR THREAT MITIGATION IN TRANSPORTATION TUNNELS

    E-Print Network [OSTI]

    Barbero, Ever J.

    Internacional de Mètodes Numèrics a l'Enginyeria (CIMNE). Gran Capita s/n. Edifici C1. Campus Nord. UPC. 08034 at a cost of $40 million [2]. Although it is difficult to prevent all situations that can lead to initial protective devices and the cost of interrupting the tunnel operations to proceed with the required

  5. POLYGENETIC TOPOGRAPHY OF THE CASCADE RANGE, WASHINGTON STATE, USA

    E-Print Network [OSTI]

    Montgomery, David R.

    POLYGENETIC TOPOGRAPHY OF THE CASCADE RANGE, WASHINGTON STATE, USA SARA GRAN MITCHELL Range of Washington State by analyzing the topography, geology, and exhumation patterns across the range-relief topography, 2) post-Miocene surface uplift of the range superimposed on pre-existing high-relief topography

  6. Technical Section Evaluating the influence of induced passive torques in the

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    , Gran via de les corts catalans, 585, 08007 Barcelona, Spain b Virtual Reality Lab, EPFL, Switzerland produce a passive torque at the limits of the joint range of motion. We present a fatigue model in which in an unconscious way. In particular, some postural adjustments arise due to muscle fatigue. In several fields

  7. GRAFOS Y ALGORITMOS OSCAR MEZA H.

    E-Print Network [OSTI]

    Meza, Oscar J.

    GRAFOS Y ALGORITMOS POR OSCAR MEZA H. Y MARUJA ORTEGA F. A B T S #12;#12;GRAFOS Y ALGORITMOS POR conceptos, propiedades y algoritmos que son en gran parte los fundamentos sobre los cuales se apoyan muchas algoritmos de búsqueda de caminos en grafos. Los algoritmos clásicos de recorridos en grafos (DFS, BFS) y de

  8. Tetrodotoxin levels in larval and metamorphosed newts (Taricha granulosa) and palatability to predatory dragonflies

    E-Print Network [OSTI]

    Brodie III, Edmund D.

    University, 5305 Old Main Hill, Logan, UT 84322, USA b Mountain Lake Biological Station and Department of the neurotoxin tetrodotoxin (TTX). Tetrodotoxin is present in adult newts and their eggs, but has been assumed in deterring predation has been well documented in adult rough-skinned newts (Taricha gran- ulosa). Newts may

  9. Rev. Int. Met. Num. Calc. Dis. Ing. (2013) Calculo eficiente de las energias de formacion de escalones

    E-Print Network [OSTI]

    Ariza Moreno, Pilar

    2013-01-01

    escalones dobles en materiales BCC E. Tellechea · O. Sabri · M.P. Ariza Resumen En materiales con estructura dislocaciones tipo tornillo en es- tos materiales, la correcta predicci´on de las energ´ias de nucleaci´on de estos escalones adquiere una gran rele- vancia. El c´alculo a nivel atom´istico de la mec´anica de

  10. Integracin de ERNCs a los sistemas elctricos chilenos

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    ;Contenidos Dimensiones de la integración de las ERNC · El importante valor de las energías renovables · Desafíos tecnológicos de su incorporación · El largo plazo y el gran desarrollo de las renovables · La falacia de los costos de las renovables y de ERNC · La necesidad de levantar las barreras a la ERNC

  11. UNIVERSIDAD AUTONOMA DE ZACATECAS FRANCISCO GARCIA SALINAS

    E-Print Network [OSTI]

    DIFERENT ES CONST RUCCIONES T EORICAS EN EL ESPACIO DE REPRESENT ACION (j, 0) (0, j) TESIS que presenta JESUS ALBERTO CAZARES MONTES para obtener el t´itulo de LICENCIADO EN FISICA asesor de tesis DR. VALERI la tesis. Sin embargo, estoy en gran deuda · Con mis padres y familiares, por todo el apoyo que me

  12. Tesis Doctoral Sobre grafos intersecci on de arcos y

    E-Print Network [OSTI]

    Lin, Min Chih

    Tesis Doctoral Sobre grafos intersecci#19;on de arcos y cuerdas en un c#19;#16;rculo Guillermo A;#16;, que sigue viva dentro de mi coraz#19;on A Clau, mi gran amor, tambi#19;en responsable de esta tesis tesis. A Marisa, Jo~ao y Claudia, por su cuidadosa lectura del trabajo y sus valiosas sugerencias que

  13. UNIVERSIDAD DE GRANADA ESCUELA TECNICA SUPERIOR DE INGENIERIAS

    E-Print Network [OSTI]

    Granada, Universidad de

    ´on Tesis Doctoral Luis Mancera Pascual Ingeniero Superior en Inform´atica 2008 #12;#12;DEPARTAMENTO DE y aplicaciones a restauraci´on Tesis Doctoral Autor: Luis Mancera Pascual Ingeniero Superior en, quiero agradecer efusivamente a Javier Portilla su gran compromiso con esta Tesis, y el enorme esfuerzo e

  14. 2 Bernd Freytag, Hartmut Holweger, Matthias Steffen, HansGunter Ludwig log 10 (H p0 /km)

    E-Print Network [OSTI]

    granules because efficient radiative exchange tends to favour larger cells. Other depth scales are less.R.G. 1 Stellar surface structure: size of granules Improvements in observational methods have opened on the Sun to those stars: First he compared the typical horizontal size of a solar granule x gran (his

  15. E S P A O L V A L E N C I E N G L I S H Experto Java

    E-Print Network [OSTI]

    Escolano, Francisco

    E S P A Ñ O L V A L E N C I À E N G L I S H Experto Java Universidad de Alicante Experto Java tutorización. Todos ellos tienen una gran experiencia docente y profesional en el campo de Java Enterprise Aplicaciones para Dispositivos Móviles. Profesor del Experto Java desde 2010. http://www.frangarcia.net Aitor

  16. Contributed Paper Identification of Areas in Brazil that Optimize

    E-Print Network [OSTI]

    Malhi, Yadvinder

    Conservaci´on del Carbono del Bosque, Jaguares y la Biodiversidad Resumen: Una gran pregunta en la pol beneficiar la conservaci´on de la biodiversidad en pa´ises tropicales. Identificamos municipalidades en peligro de extinci´on, y la biodiversidad en general. El an´alisis estad´istico preliminar mostr´o que las

  17. Radiosonde campaign in Paranal Observatory 2011: PWV measurement.

    E-Print Network [OSTI]

    to SOW document this report is a deliverable to ESO as part of the contract. 1Avenida Gran Bretaña 1111, Valparaíso, Chile. Contact: omar.cuevas@uv.cl - michel.cure@uv.cl 2European Southern Observatory 3http://www

  18. Phytologia (April 2010) 92(1) 31 GEOGRAPHIC VARIATION IN THE LEAF ESSENTIAL OILS

    E-Print Network [OSTI]

    Adams, Robert P.

    CEDRUS WEBB. & BERTHOL. FROM MADEIRA AND THE CANARY ISLANDS. Robert P. Adams Biology Department, Baylor and Evolution Research Group (IPNA-CSIC), 38206 La Laguna, Tenerife, Canary Islands, Spain Susana S. Fontinha, Tenerife, Canary Islands, Spain ABSTRACT The volatile leaf oils of J. cedrus from Madeira, Gran Canaria, La

  19. Channel bed evolution and sediment transport under declining sand inputs

    E-Print Network [OSTI]

    Montgomery, David R.

    Channel bed evolution and sediment transport under declining sand inputs Karen B. Gran,1,2 David R structure development and sediment transport as sand inputs decline. On the Pasig-Potrero River, we investigated channel recovery following emplacement of sand-rich pyroclastic deposits in the 1991 eruption

  20. ANOMALIAS DE LA PRECIPITACI ON INVERNAL EN LA PENINSULA IB ERICA Y BALEARES DESPU ES DE

    E-Print Network [OSTI]

    Bradley, Raymond S.

    ), todo ello ligado a la reducci´on de la radiaci´on solar incidente. Pero a pesar de esta constataci balance de radiaci´on terrestre. A pesar de tratarse de una incidencia epis´odica y puntual (una gran, 1995). Todo ello pues indica que, adem´as de los consabidos efectos sobre la radiaci´on terrestre

  1. viernes, 13 de junio de 2008 en Ibercampus en | Consejo Editorial | Quienes Somos | Ideario | Contacto | Tarifas PublicitariasBuscar

    E-Print Network [OSTI]

    Fernández de Córdoba, Pedro

    Biología Sintética. El MIT, considerado por el Consejo Superior de Investigaciones Científicas (CSIC) como. Básicamente, podemos hablar de cinco grandes beneficiarios de la Biología Sintética: medio ambiente, energía. Entre los proyectos presentados en pasadas ediciones, algunos han tenido una gran relevancia a nivel

  2. UNIVERSIDAD AUTNOMA DE MADRID ESCUELA POLITCNICA SUPERIOR

    E-Print Network [OSTI]

    Autonoma de Madrid, Universidad

    UNIVERSIDAD AUTÓNOMA DE MADRID ESCUELA POLITÉCNICA SUPERIOR PROYECTO FIN DE CARRERA ALGORITMOS DE Superior Universidad Autónoma de Madrid Mayo 2010 #12;IV #12;V Resumen Resumen El rápido crecimiento en el como medio de transporte debido a su gran capacidad y velocidad de transmisión. Desde hace ya varios

  3. Cmo la globalizacin fomenta y mitiga a la vez la desigualdad

    E-Print Network [OSTI]

    Bilbao Arrese, Jesús Mario

    ) Pero cuando esa sociedad alcanza niveles avanzados modernos, se produce un cierto retorno sistemático dramático hecho. Hace 50 años, un jefe ejecutivo de una gran empresa estadounidense tenía un salario medio 40 veces superior al de un empleado de mediana categoría. Ahora esa cifra se ha multiplicado por diez

  4. Ciudad Universitaria 3 de septiembre de 2012

    E-Print Network [OSTI]

    Islas, León

    educación en este ámbito es una gran opción para ampliar la cobertura del nivel superior, "un reto nacional Acatlán. La Facultad de Estudios Superiores (FES) Acatlán refrendó su compromiso con la calidad y la y evaluar productos y liderar, con estrategias innovadoras, por medio de un pensamiento crítico

  5. Un Modelo Cinematico para la Interpretacion Tridimensional de Proyecciones Poliedricas.

    E-Print Network [OSTI]

    Ros, Lluís

    Federico Thomas Institut de Robotica i Informatica Industrial Gran Capita 2-4 08034 Barcelona e-mail: llros dibujo lineal al estudio de las propiedades cinematicas de una estructura de paneles articulados demostramos que un dibujo lineal es es- pacialmente realizable si y solo si la estructura tie- ne un

  6. JULY 24, 1998 SIERRA NEVADA SCIENCE REVIEW

    E-Print Network [OSTI]

    pages behind Appendix II) III. CHARGE TO THE SCIENCE TEAM 110 IV. SCIENCE TEAM 113 V. PEER REVIEW LIST 114 VI. DISTRIBUTION LIST 115 #12;iii PREFACE Una gran Sierra Nevada, a large, jagged, snow if only daily or seasonally. As a result, the Sierra now has roads, dams, reservoirs, power lines, homes

  7. The Impact of LUNA Results on Astroparticle Physics

    SciTech Connect (OSTI)

    Gustavino, Carlo [INFN Sezione di Roma, I-00185 Roma (Italy)

    2011-10-28

    LUNA (Laboratory for Underground Nuclear Astrophysics) is devoted to measure nuclear cross sections relevant in astroparticle physics. The facility operates underground, at the 'Laboratori Nazionali del Gran Sasso'(LNGS), where the cosmic ray induced background is very low. The LUNA measurements are important in neutrino physics, in the study of the Sun and other celestial bodies, in the Big Bang Nucleosynthesis.

  8. SISTEMES D'ACUMULACIO D'ENERGIA Les energies renovables com la solar o la e`olica tenen un caracter inter-

    E-Print Network [OSTI]

    Batiste, Oriol

    SISTEMES D'ACUMULACI´O D'ENERGIA Les energies renovables com la solar o la e`olica tenen un´o a gran escala d'energies d'origen renovable. Des d'un punt de vista econ`omic es pot augmentar la

  9. IDENTIFICACIN El macho presenta en el dorso de las alas una extensa rea de color azul oscuro brillante que al-

    E-Print Network [OSTI]

    García-Barros, Enrique

    transectos realizados en distintas poblaciones ibéricas se obtuvieron densidades de entre Phengaris concentración de poblaciones. HÁBITAT y BIOLOGíA El hábitat de P. nausithous se identifica con las comunidades de una gran cantidad de colonias de hormigas para la presencia de poblaciones importantes de P. nau

  10. Desarrollo de un Laboratorio Virtual para el Estudio y Simulacin de Mecanismos en la Ingeniera

    E-Print Network [OSTI]

    Rivero, Jose Pablo Suárez

    formación etc. Una extensión del trabajo permitirá integrar estas herramientas en un verdadero paradigma de herramientas que facilitan el desarrollo de aplicaciones de Realidad Virtual han experimentado un gran avance entornos de desarrollo de mundos virtuales como SupersCape, Cybelius, Internet Space Builder, Internet

  11. Calculation of intervention doses for the CNGS facility

    E-Print Network [OSTI]

    Lorenzo-Sentis, M; Roesler, Stefan

    2006-01-01

    The purpose of the CNGS (CERN Neutrinos to Gran Sasso) project is to generate at CERN a powerful artificial muon-neutrino beam aimed at the Gran Sasso Laboratory in Italy. There, detectors will detect those neutrinos and try to disentangle those, which on their 730 km trip have changed their flavour. During the operating lifetime of the neutrino beam facility some interventions are required. These maintenance operations have to be planned in advance to define the guidelines of design and operational procedures in order to keep the doses received by personnel As Low As Reasonably Achievable (ALARA-principle). A calculational method developed for the Monte Carlo simulation program FLUKA has been used, which allows one to compute dose equivalent rates from induced radioactivity for different cooling times in the regions of the human intervention. In this paper the method of calculation is described, the results of dose equivalent rate in the areas of interventions are summarized and discussed and finally, these ...

  12. Transition Radiation Detector in MACRO

    E-Print Network [OSTI]

    M. N. Mazziotta; for the MACRO Collaboration

    1999-05-13

    The MACRO detector is located in the Gran Sasso Laboratory. MACRO's overburden varies from 3150 to 7000 hg/cm^2. A transition radiation detector (TRD) has been added to the MACRO detector in order to measure the residual energy of muons entering MACRO, i.e. the energy they have after passing through the Gran Sasso's rock overburden. The TRD consists of three identical modules with a total horizontal area of 36 m^2. The results presented here are referred to single and double events in MACRO with one muon crossing one of the TRD modules. Our data show that double muons are more energetic than single ones, as predicted by the interaction models of primary cosmic rays with the atmosphere.

  13. Festival Report: Festival Iberoamericano de Teatro

    E-Print Network [OSTI]

    Cajamarca Castro, Orlando

    1988-10-01

    apoyo de la tecnología. En Himno hay una gran preocupación por lo argumentai a través del movimiento propio de la danza, pero no establece la sutura justa con lo teatral pues el lenguaje de la danza es libreasociativo, evocativo, simbólico, particular..., y el teatral es anecdótico referencial, directo, general, de tal manera que el espectáculo invita una lectura danza-teatral pero no define los códigos de su alfabeto. La teatralización de la tecnología o el teatro tecnológico La compañía La...

  14. Festival Report: Festival Internacional de Teatro de Expresión Ibérica (FITEI 99)

    E-Print Network [OSTI]

    Perales, Rosalina

    1999-10-01

    espacio escénico con la utilización de cables, cuerdas, sogas y cadenas; la invasión, hasta niveles impensables, de la tecnología de multimedios y el desbordante uso del cuerpo mediante movimientos especiales como los de la danza, la acrobacia o la... anterior. Es que ahora no podemos escapar del asedio total a los sentidos. El poco uso de la voz y el gran despliegue de tecnología multimedia creó un acalorado debate sobre la autenticidad del género. Si eso 136 LATIN AMERICAN THEATRE REVIEW era teatro...

  15. Festival Report: XI Festival Iberoamericano de Teatro de Cádiz

    E-Print Network [OSTI]

    Reverte Bernal, Concepció n

    1997-10-01

    del medio ambiente, con un gran despliegue imaginativo de objetos en escena. El buen hacer y afán de perfección del grupo quedó subrayado tras la obra al solicitar la colaboración de los espectadores para mejorarla, algo difícil ya que se trataba de... escenario alargado, que simula varios ambientes y las distancias de ese 146 LATIN AMERICAN THEATRE REVIEW largo y estrecho país que es Chile, se mueven los actores que caracterizan de manera estereotipada e hiperbólica un melodrama rural chileno: el...

  16. Festival Report: Festival de Teatro UNCOLI

    E-Print Network [OSTI]

    Gutié rrez, Alfonso

    1999-10-01

    del Lycée Français Louis Pasteur puede haberle trastocado sus actividades curriculares, pero la gran labor realizada con este extraordinario festival, sus talleres y conferencias sobre el arte dramático, hace que esa institución se destaque en estos... momentos tan difíciles de la divulgación cultural. Ojalá la oficina Actividades Socio-Educativas se amplíe a otros sectores culturales de la ciudad y en un nuevo festival participen más colegios. Alfonso Gutiérrez Santafé de Bogotá 222 LATIN AMERICAN...

  17. The XENON100 Dark Matter Experiment

    SciTech Connect (OSTI)

    Tziaferi, E.

    2010-06-23

    The XENON100 experiment is searching for WIMPs, which are particles that may consist dark matter. It is located in the underground laboratory of Gran Sasso (LNGS) in Italy at a depth of {approx}3600 m.w.e.. The experiment description, its performance and the expected background based on Monte Carlo simulations and material screening along with the projected sensitivities of the experiment are presented. In addition, a brief description of the upgrade XENON100 detector is given.

  18. Conference Report: VII Jornadas Internacionales de Teatro Latinoamericano

    E-Print Network [OSTI]

    Galvá n, Felipe

    1999-10-01

    cuanto a géneros teatrales se refiere, en México, manejan o conocen la teoría de Luisa Josefina Hernández. El homenaje acercó, entonces, a una autora de gran importancia y una teórica toral en las letras mexicanas. Organizadas en diez mesas de... interinstitucionales universitarios y rigor académico que las ha caracterizado. La primera mesa, moderada por Joel Dávila Gutiérrez, se tituló "Historiografía teatral mexicana" y en ella intervinieron tres investigadores. El primero, Ricardo Pérez Quitt, de la...

  19. Computerisation of a corpus of personal correspondence spanning the 19th and 20th centuries: the study of linguistic variation

    E-Print Network [OSTI]

    Perea, Maria-Pilar

    2010-01-01

    —??132??— Computerisation of a corpus of personal correspondence spanning the 19th and 20th centuries: the study of linguistic variation Maria-pilar perea Universitat de Barcelona, Departament de Filologia Catalana, Gran Via de les Corts...??— Computerisation of a corpus of personal correspondence spanning … 1 Introduction The CD-ROM “Epistolari d’Antoni M. Alcover (1880–1931)” [Antoni M. Al- cover’s correspondence], published in 2008, contains the complete transcrip- tion of the Majorcan dialectologist...

  20. Importantes avances para la nueva dramaturgia mexicana

    E-Print Network [OSTI]

    Burgess, Ronald D.

    1985-10-01

    FALL 1985 97 Importantes avances para la nueva dramaturgia mexicana Ronald D. Burgess El verano de 1985 vio dos acontecimientos importantes en la trayectoria del teatro mexicano, y sobre todo en cuanto a los escritores jóvenes. Desde un... resultado de estos y otros obstáculos ha sido un número mínimo de puestas en escena de recientes obras mexicanas, y de obras experimentales. De gran impacto, pues, fue el anuncio en una reunión de teatristas el 15 de junio, en el teatro San Rafael, donde...

  1. UNA ARQUITECTURA SEGMENTADA PARA EL CLCULO DEL TIEMPO AL IMPACTO CON VISIN LOG-POLAR

    E-Print Network [OSTI]

    Valencia, Universidad de

    imágenes a alta velocidad. La arquitectura está orientada a la optimización de algoritmos diferenciales de visión, en los que se puede incluir una gran cantidad de algoritmos interesantes para navegación de cantidad de datos a procesar y simplificar los algoritmos de visión. La utilización de FPGAs basadas en

  2. ¡Hacia dónde va el teatro en Cali!

    E-Print Network [OSTI]

    Cajamarca Castro, Orlando

    1990-10-01

    producto artístico y estabilizar la empresa generadora del espectáculo. Ése parece ser el objetivo de la campaña. Pretender hacer ajustes como si fuera simplemente cambiar de piñon-- vulgarmente se llama cambios mecánicos-, aceptar la crisis y la..., pero en igualdad de condiciones con opciones artísticas de riesgo dramaturgia) y gran calidad; desde luego que la calidad artística no se puede reducir a un criterio técnico ni a un dictamen de la moda internacional o al éxito taquillero. La calidad...

  3. Festival Report: XII (1997) y XIII (1998) edición del Festival Iberoamericano de Teatro de Cádiz

    E-Print Network [OSTI]

    Reverte Bernal, Concepció n

    1999-10-01

    consecuencia del crack de la bolsa, cuando pensaban que su posición estaba asegurada. Con la magnífica interpretación de Guillermo Gil, Víctor Hugo Martín y José Carlos Rodríguez y dirección de Luis de Tavira, el espectáculo, sustentado en el diálogo, gustó... salto más allá para establecer valores desconocidos; El Periférico de Objetos ejerce el teatro para hacer visible aquello que, culturalmente, de ninguna forma y bajo ningún pretexto puede serlo." La obra ha tenido gran éxito en Buenos Aires (según...

  4. Guadalupe años sin cuenta: El lenguaje oral como instrumento de resistencia ideológica

    E-Print Network [OSTI]

    Garavito, Lucí a

    1987-04-01

    de información. Dado entonces que la credibilidad—y no precisamente la objetividad—es el punto clave respecto a la relación entre el emisor y el receptor, el prólogo de Guadalupe años sin cuenta muy apropiadamente centra su enfoque en minar el... valor adscrito a las autoridades del gobierno como fuentes confiables de información. Logra tal objetivo al mostrar que en el proceso de investigación de la muerte de Salcedo hay una gran discrepancia entre la evidencia y las afirmaciones de los...

  5. I Taller Internacional del Nuevo Teatro (Cuba 1983)

    E-Print Network [OSTI]

    Rizk, Beatriz J.

    1983-04-01

    luego. El título de algunos de los poemas elegidos y representados finalmente, explícitamente señalan su contenido, sin que tengamos que detenernos en ellos: "el hambre," "la bomba atómica," "el Caribe," "el sueño," "los usureros," "Aviso: Gran Zoo... de trasfondo como un elemento más, o de apuntamiento crítico como en el trabajo presentado por el equipo que dirigió Atahualpa del Cioppo; el texto de los poemas escogidos "Aviso," "Usureros," "Bomba Atómica" y "Cierre" fue cantados por un...

  6. thE Erc grantEEs 2010 / 2011 ERC Grantees 2010 / 2011 1

    E-Print Network [OSTI]

    Blatt, Rainer

    #12;ExcEllEnt thE Erc grantEEs 2010 / 2011 #12;#12;ERC Grantees 2010 / 2011 1 The erc granTees 2010 The erc #12;2 ERC Grantees 2010 / 2011 a truly european success story F ive years after its launch TöchTerle Austrian Federal Minister for Science and Research #12;ERC Grantees 2010 / 2011 3 The erc

  7. Godofredo Iommi Calculo Real

    E-Print Network [OSTI]

    Iommi, Godofredo

    Godofredo Iommi C´alculo Real #12;#12;Prefacio Estas son notas constru´idas a partir de diversos cursos de c´alculo dictados en la Pontificia Universidad Cat´olica de Chile entre 2008 y 2014. Los gran cantidad de muy buenos textos de c´alculo y de an´alisis en una variable y estas notas estan

  8. ICARUS and Status of Liquid Argon Technology

    E-Print Network [OSTI]

    Dorota Stefan

    2011-10-07

    ICARUS is the largest liquid argon TPC detector ever built (~600 ton LAr mass). It operates underground at the LNGS laboratory in Gran Sasso. It has been smoothly running since summer 2010, collecting data with the CNGS beam and with cosmics. Liquid argon TPCs are really "electronic bubble chamber" providing a completely uniform imaging and calorimetry with unprecedented accuracy on massive volumes. ICARUS is internationally considered as a milestone towards the realization of the next generation of massive detectors (~tens of ktons) for neutrino and rare event physics. Results will be presented on the data collected during 2010 with the detector at LNGS.

  9. Search for neutrinoless double-beta decay of Ge-76 with GERDA

    E-Print Network [OSTI]

    Karl-Tasso Knoepfle

    2008-10-17

    GERDA, the GERmanium Detector Array experiment, is a new double beta-decay experiment which is currently under construction in the INFN National Gran Sasso Laboratory (LNGS), Italy. It is implementing a new shielding concept by operating bare Ge diodes - enriched in Ge-76 - in high purity liquid argon supplemented by a water shield. The aim of GERDA is to verify or refute the recent claim of discovery, and, in a second phase, to achieve a two orders of magnitude lower background index than recent experiments. The paper discusses motivation, physics reach, design and status of construction of GERDA, and presents some R&D results.

  10. El teatro cubano para jóvenes: La apariencia y el mensaje

    E-Print Network [OSTI]

    Pozin, Mikhail

    1995-04-01

    comunista. Partiendo de este concepto, los autores de Tema para Verónica y Proyecto de amor no ven nada malo en mostrar a la gente urbana que trabaja en el campo ayudando a los campesinos. En Cuba se practica el uso del trabajo voluntario en gran escala... limitaciones, el espectador puede reconocer cierto realismo, verdadero en la representación de los protagonistas y de la vida diaria. Es notable en las obras la presencia de un compromiso ideológico. Pero dada la crisis de la economía cubana se advierte...

  11. Doctrina breve muy provechosa de las cosas que pertenecen a la fe católica y a nuestra cristiandad en estilo llano para común inteligencia 

    E-Print Network [OSTI]

    Zumá rraga, Juan de, 1468-1548; 1544 Doctrina breve muy provechosa de las cosas que pertenecen a la fe cató lica y a nuestra cristiandad en estilo llano para comú n inteligencia  Zumá rraga, Juan de, 1468-1548 Family Financial Fitness Exercises: The Importance of Saving Money  White, Lynn

    1999-09-13

    le ahorra dinero. ? Estar? preparado para emergencias. Ahorrar requiere control. ? P?guese usted mismo primeramente de cada cheque de pago. Ahorrar aunque sean cantidades peque?as de cada cheque de pago puede hacer una gran diferencia. ? Aseg?rese de... que tiene en sus manos una verdadera emergencia antes de usar sus ahorros. ? Sepa para que est? ahorrando. Si est? tentado a utilizar sus ahorros para otra cosa, preg?ntese si est? dispuesto a renunciar al art?culo que hab?a planeado comprar. Ponga...

  12. The bipolar diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grun) J2rg.: morphology and autecology of disjunct populations 

    E-Print Network [OSTI]

    Villareal, Tracy Alan

    1981-01-01

    antarctica Karsten Frenguellip 1960 Amh~ ~k'll '' . t' lt (G . )Cl. ~GA E *I d' Ot p Pd ' h d . El I G'' Thalassiosira heshing (Grun. ) Gran A~t*hl hk''Eh Triceratium arcticum Brightwell Rhizosolenia alata f, inermis (Castr. ) Rust. Hasle, 1976... Thalassiosira antarctica Comber P ' El ' I' (G . ) Jd E. If't* h' ~ uf' d d(G . ) E I 10 Expedition (Table 1). Neither author speculated on the origin of the disjunct populations. Hasle and Heimdal (1968) added Thalassiosira antarctica Comber to the list...

  13. Physics Potential and Prospects for CUORE and CUORICINO experiments

    E-Print Network [OSTI]

    I. G. Irastorza; A. Morales; S. Scopel; S. Cebrian

    2002-06-17

    The CUORE (Cryogenic Underground Observatory for Rare Events) experiment projects to construct and operate an array of 1000 cryogenic thermal detectors of a mass of 760 g each to investigate rare events physics, in particular, double beta decay and non baryonic particle dark matter. A first step towards CUORE is CUORICINO, an array of 56 of such bolometers, currently being installed in the Gran Sasso. In this paper we report the physics potential of both stages of the experiment regarding neutrinoless double beta decay of 130Te, WIMP searches and solar axions.

  14. Measurement of the specific activity of Ar-39 in natural argon

    E-Print Network [OSTI]

    Benetti, P; Calligarich, E; Cambiaghi, M; Carbonara, F; Cavanna, F; Cocco, A G; Pompeo, F D; Ferrari, N; Fiorillo, G; Galbiati, C; Grandi, L; Mangano, G; Montanari, C; Pandola, L; Rappoldi, A; Raselli, G L; Roncadelli, M; Rossella, M; Rubbia, Carlo; Santorelli, R; Szelc, A M; Vignoli, C; Zhao, Y

    2006-01-01

    We report on the measurement of the specific activity of Ar-39 in natural argon. The measurement was performed with a 2.3-liter two-phase (liquid and gas) argon drift chamber. The detector was developed by the WARP Collaboration as a prototype detector for WIMP Dark Matter searches with argon as a target. The detector was operated for more than two years at Laboratori Nazionali del Gran Sasso, Italy, at a depth of 3,400 m w.e. The specific activity measured for Ar-39 is 0.87 +/- 0.02(stat) +/- 0.08(syst) Bq per kg of natural Ar.

  15. Teatro Nacional Popular: Un teatro popular o la popularización del teatro (Entrevista con Alonso Alegría).

    E-Print Network [OSTI]

    Podesta A., Bruno

    1973-10-01

    tipo de obras van a llevar ustedes ? A. A. Eso es lo que está por verse. Esa es la gran búsqueda, eso es lo terrible, que no existe material escrito que se adecúe plenamente a los intereses del grupo humano al que nosotros queremos referirnos... hecho este tipo de intento, en concreto el TUC, por ejemplo? A. A. Por supuesto. B. P. ¿En qué medida.. ? A. A. El TUC nos ha hecho llegar un informe sobre su experiencia con Santa Juana de los mataderos, que nosotros hemos leído cuidadosamente. Nos...

  16. Ann bay lodyans 2 / se Bryant Freeman ("Tonton Liben") ki pare ti liv sa a

    E-Print Network [OSTI]

    Freeman, Bryant C.

    2000-01-01

    tonton an di li: "Zafe moun pa gade Neg la sezi. Li joure tonton an, epi I ale fe wout li. Nan yon ti bout I £l|P' =kite vye chemen pou chemen nef." ou. chemen, li...: "Pa kite vye chemen pou chemen nef." Lamenm li pran wout vye chemen. Epi void yo ki t ap tann li nan gran chemen rete jouk devanjou, bekeke. Neg la mache anpil anko anvan li rive lakay li. Le I rive, li pa t fin fe jou. Li ale sere estati a nan...

  17. Republica ed Cuba Provincia de Matanzas 

    E-Print Network [OSTI]

    Cuba. Ministerio de Obras Publicas; Cuba. Junta Nacional de Planificació n

    1956-01-01

    bombear agua Juan Enciso y Michael Mecke* incluyendo el costo inicial, los costos de la energ?a y los costos de mantenimiento. Energ?a e?lica El viento se utiliza a menudo como una fuente de energ?a para operar las bombas de agua y sum- inistrar agua al... ganado. Debido a la gran cantidad de agua necesaria para los cultivos, la energ?a e?lica se utiliza raramente para regar los cultivos. A medida que se desarrollen turbinas de viento m?s grandes y/o m?s eficientes, se espera que gru- pos de este tipo de...

  18. Does OPERA probe that the Earth is moving ?

    E-Print Network [OSTI]

    Dominique Monderen

    2011-10-17

    The OPERA experiment reported recently a puzzling result. The time of flight of a neutrino beam between the CERN and the Gran Sasso Laboratory has been measured to be slightly shorter than expected. More precisely, an early arrival time of the neutrino with respect to the one computed assuming the speed of light in vacuum of 60.7 ns was measured, with a quite high confidence level. Alternatively, one can conclude that the neutrinos travelled 18.2 m more than light would do in vacuum. In this short paper, we suggest a possible systematic effect that does not appear in the analysis and which can easily been probed to be confirmed.

  19. Homenaje a Alfonso Reyes

    E-Print Network [OSTI]

    Gaucher-Morales, Jeanine S.

    1990-04-01

    SPRING 1990 157 Homenaje a Alfonso Reyes Jeanine S. Gaucher-Morales En el Primer Gran Festival de la Ciudad de México, verano 1989, se incluyó un espectáculo teatral celebrando el centenario del nacimiento de Alfonso Reyes, La conspiración de... presenta a Alfonso Reyes a finales de los años veinte en Madrid en el primer acto, y a su regreso en el segundo acto a México, después de unos veinticinco años de exilio voluntario. La obra enfoca a Reyes como hombre y literato, utilizando elementos...

  20. Low energy neutron background in deep underground laboratories

    E-Print Network [OSTI]

    Andreas Best; Joachim Gorres; Matthias Junker; Karl-Ludwig Kratz; Matthias Laubenstein; Alexander Long; Stefano Nisi; Karl Smith; Michael Wiescher

    2015-09-02

    The natural neutron background influences the maximum achievable sensitivity in most deep underground nuclear, astroparticle and double-beta decay physics experiments. Reliable neutron flux numbers are an important ingredient in the design of the shielding of new large-scale experiments as well as in the analysis of experimental data. Using a portable setup of He-3 counters we measured the thermal neutron flux at the Kimballton Underground Research Facility, the Soudan Underground Laboratory, on the 4100 ft and the 4850 ft levels of the Sanford Underground Research Facility, at the Waste Isolation Pilot Plant and at the Gran Sasso National Laboratory. Absolute neutron fluxes at these laboratories are presented.

  1. Low energy neutron background in deep underground laboratories

    E-Print Network [OSTI]

    Best, Andreas; Junker, Matthias; Kratz, Karl-Ludwig; Laubenstein, Matthias; Long, Alexander; Nisi, Stefano; Smith, Karl; Wiescher, Michael

    2015-01-01

    The natural neutron background influences the maximum achievable sensitivity in most deep underground nuclear, astroparticle and double-beta decay physics experiments. Reliable neutron flux numbers are an important ingredient in the design of the shielding of new large-scale experiments as well as in the analysis of experimental data. Using a portable setup of He-3 counters we measured the thermal neutron flux at the Kimballton Underground Research Facility, the Soudan Underground Laboratory, on the 4100 ft and the 4850 ft levels of the Sanford Underground Research Facility, at the Waste Isolation Pilot Plant and at the Gran Sasso National Laboratory. Absolute neutron fluxes at these laboratories are presented.

  2. Zambullida en el Orinoco de Carballido

    E-Print Network [OSTI]

    Montes-Huidobro, Matí as

    1982-04-01

    . Carente la obra de pirotecnia innecesaria, Carballido utiliza los efectos so noros con gran concisión y precisión. Sin embargo, con lo expuesto en el pá rrafo anterior traza una síntesis de la mecánica creadora de la obra. Además, la primera referencia...." Tiempo y embarcación se integran tanto con la acción, que se hace funcional la mecánica teatral de acuerdo con la aproximación de Ken neth Burke: "Using 'scene' in the sense of setting, or background, and 'act' in the sense of action, one could say...

  3. Effects of amounts and types of sodium bicarbonate in wheat flour tortillas 

    E-Print Network [OSTI]

    Garza Casso, Jessica Beatriz

    2007-04-25

    Villarreal. Papi, esta tesis te la dedico especialmente a ti, por el gran apoyo que has sido para mi en todos estos años. Por tus enseñanzas y por siempre motivarme y darme fuerza para seguir adelante. Muchas Gracias. Lorena Nohemí Garza Casso, my... beloved sister. Lore, muchas gracias por creer en mi, espero ser siempre un buen ejemplo para ti. Te agradezco mucho todo tu apoyo, y siempre estar a mi lado. Te quiero. Eberhard Laepple, my husband, for your patience and trust; for motivating me...

  4. The influence of ammonium nitrogen and phosphorus on the soil microflora as related to the seedling disease complex of cotton 

    E-Print Network [OSTI]

    Morales-Bermudez, Marciano

    1956-01-01

    interesting results vhen Granosan vas used as a soil- sterilising agent for controlling damping-off of pine seedlings caused by R. solani and ~thrum ultissns Trow. In seven experiments, when Gran- osan was applied to the seed bed in a 0. 3 per cent aqueous... in the center of a Petri plate containing the medium. The dilution was spread completely over the surface of tba medium with a sterilised glass rod. Tha plates were numbered according to treatments. Five plates were made for every treatment, The platea were...

  5. A simulation-based study of the neutron backgrounds for NaI dark matter experiments

    E-Print Network [OSTI]

    Eunju Jeon; Yeongduk Kim

    2015-03-26

    Among the direct search experiments for weakly interacting massive particle (WIMP) dark matter, the DAMA experiment observed an annual modulation signal interpreted as WIMP interactions with a significance of 9.2$\\sigma$. Recently, Jonathan Davis claimed that the DAMA modulation may be interpreted on the basis of the neutron scattering events induced by the muons and neutrinos together. We tried to simulate the neutron backgrounds at the Gran Sasso and Yangyang laboratory with and without the polyethylene shielding to quantify the effects of the ambient neutrons on the direct detection experiments based on the crystals.

  6. A simulation-based study of the neutron backgrounds for NaI dark matter experiments

    E-Print Network [OSTI]

    Jeon, Eunju

    2015-01-01

    Among the direct search experiments for weakly interacting massive particle (WIMP) dark matter, the DAMA experiment observed an annual modulation signal interpreted as WIMP interactions with a significance of 9.2$\\sigma$. Recently, Jonathan Davis claimed that the DAMA modulation may be interpreted on the basis of the neutron scattering events induced by the muons and neutrinos together. We tried to simulate the neutron backgrounds at the Gran Sasso and Yangyang laboratory with and without the polyethylene shielding to quantify the effects of the ambient neutrons on the direct detection experiments based on the crystals.

  7. Clearing Debris from Land (Spanish) 

    E-Print Network [OSTI]

    McFarland, Mark L.

    2007-10-08

    cu?l es la madera que puede salvarse. Podr?a necesitar contar con equipo espe- cializado para despejar eficientemente ?reas de gran extensi?n. Remoci?n de escombros Puede optar entre diferentes m?todos para la remoci?n de escombros de ?rboles: Buld...?zer ? Cont?ctese con un horticultor o especialista forestal de Extensi?n para inspeccionar los ?rboles da?ados y determinar si pueden sal- varse. ? Retire ?rboles valiosos antes de remover los escombros. ? De ser posible, ate un rastrillo en el frente de una...

  8. Controlling Houseflies (Spanish) 

    E-Print Network [OSTI]

    Tomberlin, Jeffery K.

    2007-10-08

    , Especialista en Entomolog?a en Extensi?n Sistema Universitario Texas A&M La mosca dom?stica puede encontrarse en todo el mundo y vive cerca de los humanos. Dado que las moscas dom?sticas son portadoras de muchas enfermedades en personas y animales dom...?sticos, es importante mantener baja la poblaci?n de estos insectos. Entender sus h?bitos y su ciclo de vida puede ayudar a eliminar gran parte de las moscas a bajo costo para usted y el medioambiente. Descripci?n La mosca dom?stica es una mosca que no pica...

  9. LUNA and the Sun

    SciTech Connect (OSTI)

    Broggini, Carlo; Collaboration: LUNA Collaboration

    2014-05-09

    One of the main ingredients of nuclear astrophysics is the knowledge of the thermonu-clear reactions responsible for the stellar luminosity and for the synthesis of the chemical elements. Deep underground in the Gran Sasso Laboratory the cross section of the key reactions of the proton-proton chain and of the Carbon-Nitrogen-Oxygen (CNO) cycle have been measured right down to the energies of astrophysical interest. The main results obtained in the past 20 years are reviewed and their influence on our understanding of the properties of the neutrino and the Sun is discussed.

  10. The Flourishing of Hispanic Theatre in the Southwest, 1920-30's

    E-Print Network [OSTI]

    Kanellos, Nicolá s

    1982-10-01

    de los extras, Su excelencia el amor, México quiere paz (apropósito cómico-lírico), La maldita guerra (zarzuela), El Gran Visir, Loco amor, El proceso de Los Angeles, Las luces de Los Angeles, Los Angeles en pijama and Revista de radio 1934.... But his full-length dramas, Los emigrados and El sacrificio again dealt with the epic of Mexicans in California, the latter play with a 34 LATIN AMERICAN THEATRE REVIEW setting in 1846. Other dramas by Navarro are Cuando entraron los Dorados, Alma...

  11. La voz en off de Sor Juana: Tren nocturno a Georgia y el teatro mexicano al comienzo del milenio

    E-Print Network [OSTI]

    Luiselli, Alessandra

    2000-04-01

    en un juego singularmente peligroso, ya que el papel que deberá representar la joven no hará sino exponer con gran detalle la represión sexual característica de la sociedad patriarcal. Este aparente juego, en el cual la voz de Sor Juana en bellos... invadido, de acuerdo al alevoso juego, por Stephanie, la estudiante que ha aceptado jugar a ser, en palabras textuales de su novio, "la manzana del paraíso" (535). Será ella quien inicie el encuentro sexual con la profesora, luego de varias semanas en...

  12. Una tarde con Héctor Mendoza

    E-Print Network [OSTI]

    Padró n-Leó n, Bá rbara A.; Peale, C. George

    1999-10-01

    amabilísimo y gran amigo de él fue Tirso de Molina, monje mercedario. Entonces, lo que yo me imaginé primero era como un colegio de monjes mercedarios haciéndole una obra homenaje a Ruíz de Alarcón, representando como a la memoria de Ruíz de Alarcón con... años que quedan de esta década? No lo sé. Nunca hago planes a largo plazo, y mucho menos ahora que ya estoy viejo y me puedo morir en cualquier momento. Yo planeo lo inmediatamente próximo que voy a hacer, lo próximo nada más. En estos momentos...

  13. Search for Neutrinoless Double Beta Decay with the CUORE experiment

    SciTech Connect (OSTI)

    Gorla, P. [Laboratori Nazionali del Gran Sasso-INFN, S.S. 17 bis, km 18-910 67010 Assergi (Italy)

    2009-12-17

    CUORE is a next generation experiment aimed at the detection of neutrinoless Double Beta Decay of the nuclide {sup 130}Te. The experiment, which will take place in the Gran Sasso National Laboratory (Italy), will look for this rare decay using the macrobolometric technique with a prospected array of 988 detectors. Each bolometer will be constituted by a 5x5x5 cm{sup 3} TeO{sub 2} crystal, for a total mass of about 200 kg of {sup 130}Te, and will be maintained at a temperature of 10 mK. CUORE will probe the effective mass of the neutrino with a sensitivity of a few tens of meV. If an excess of counts are observed above background at the 2.5 MeV corresponding to the Q-value of the decay, CUORE will answer several questions that are still open in the field of neutrino physics, such as the determination of the particle's Majorana nature and of the absolute mass scale. A prototype for CUORE in Gran Sasso, named CUORICINO, has just closed after five years proving its importance as a stand-alone experiment.

  14. Myth and catastrophic reality: using cosmogonic mythology to identify cosmic impacts and massive plinian eruptions in holocene South America.

    SciTech Connect (OSTI)

    Masse, W. B. (William Bruce)

    2004-01-01

    Major natural catastrophes (e.g., 'universal' floods, fire, darkness, and sky falling down) are prominently reflected in traditional South American creation myths, cosmology, religion, and worldview. We are now beginning to recognize that cosmogonic myths represent a rich and largely untapped data set concerning the most dramatic natural events and processes experienced by each cultural group during the past several thousand years. Observational details regarding specific catastrophes are encoded in myth storylines, typically cast in terms of supernatural characters and actions. Not only are the myths amenable to scientific analysis, but also some sets of myths encode multiple catastrophes in meaningful relative chronological order. The present study considers more than 4200 myths, including more than 260 'universal' catastrophe myths from cultural groups throughout South America. These myths are examined in light of available geological, paleoenvironmental, archeological, and documentary evidence. Our analysis reveals three possible ultra-plinian volcanic eruptions, two in Columbia and the other in the Gran Chaco, the latter likely associated with a poorly dated late Holocene eruption of Nuevo Mundo in central Bolivia. Our analysis also identifies a set of traditions likely linked with the well-known Campo del Cielo iron meteorite impact in northern Argentina originally hypothesized to have occurred around 4000 years ago. Intriguingly, these traditions strongly suggest that the Campo del Cielo impact triggered widespread mass fires in the Gran Chaco region and possibly in the Brazilian Highlands. Several other potential cosmic impacts, distinct from Campo del Cielo, are hinted at in the mythology of other locations in South America. The numerous catastrophe myths in the Gran Chaco region exhibit the most coherent chronological sequence of any South American region. The sequence begins with a 'Great Flood,' by far the most widespread catastrophe myth in South America, typically represented as the beginning of our modern world. The great flood is followed 'many generations' later by the 'Great Fire' (hypothesized as the Campo del Cielo impact) with the 'Great Darkness' and 'sky falling down' (hypothesized as the Nuevo Mundo eruption) being the most recent catastrophe, occurring 'many generations' after the great fire. We draw upon the physical record to suggest rough calendrical dates for these witnessed catastrophic events.

  15. Ventilation and air-conditioning concept for CNGS underground areas

    E-Print Network [OSTI]

    Lindroos, J

    2002-01-01

    The aim of the CNGS project is to prove the existence of neutrino oscillation by generating an intense neutrino beam from CERN in the direction of the Gran Sasso laboratory in Italy, where two large neutrino detectors are built to detect the neutrinos. All the components for producing the neutrino beam will be situated in the underground tunnels, service galleries and chambers. The ventilation and air-conditioning systems installed in these underground areas have multiple tasks. Depending on the operating mode and structure to be air-conditioned, the systems are required to provide fresh air, cool the machine, dehumidify areas housing sensible equipment or assure the smoke removal in a case of a fire. This paper presents the technical solutions foreseen to meet these requirements.

  16. First search for double beta decay of platinum by ultra-low background HP Ge gamma spectrometry

    E-Print Network [OSTI]

    P. Belli; R. Bernabei; F. Cappella; R. Cerulli; F. A. Danevich; A. Di Marco; A. Incicchitti; M. Laubenstein; S. S. Nagorny; S. Nisi; O. G. Polischuk; V. I. Tretyak

    2011-04-29

    A search for double beta processes in 190Pt and 198Pt was realized with the help of ultra-low background HP Ge 468 cm^3 gamma spectrometer in the underground Gran Sasso National Laboratories of the INFN (Italy). After 1815 h of data taking with 42.5 g platinum sample, T_{1/2} limits on 2beta processes in 190Pt (\\epsilon\\beta^+ and 2\\epsilon) have been established on the level of 10^{14}-10^{16} yr, 3 to 4 orders of magnitude higher than those known previously. In particular, a possible resonant double electron capture in 190Pt was restricted on the level of 2.9 \\times 10^{16} yr at 90% C.L. In addition, T_{1/2} limit on 2 beta^- decay of 198Pt (2\

  17. Radioactive contamination of BaF2 crystal scintillator

    E-Print Network [OSTI]

    O. G. Polischuk; P. Belli; R. Bernabei; F. Cappella; V. Caracciolo; R. Cerulli; A. Di Marco; F. A. Danevich; A. Incicchitti; D. V. Poda; V. I. Tretyak

    2013-12-17

    Barium fluoride (BaF$_2$) crystal scintillators are promising detectors to search for double beta decay processes in $^{130}$Ba ($Q_{2{\\beta}}$ = 2619(3) keV) and $^{132}$Ba ($Q_{2{\\beta}}$ = 844(1) keV). The $^{130}$Ba isotope is of particular interest because of the indications on 2${\\beta}$ decay found in two geochemical experiments. The radioactive contamination of BaF$_2$ scintillation crystal with mass of 1.714 kg was measured over 113.4 hours in a low-background DAMA/R&D set-up deep underground (3600 m w.e.) at the Gran Sasso National Laboratories of INFN (LNGS, Italy). The half-life of $^{212}$Po (present in the crystal scintillator due to contamination by radium) was estimated as $T_{1/2}$ = 298.8 $\\pm$ 0.8(stat.) $\\pm$ 1.4(syst.) ns by analysis of the events pulse profiles.

  18. An actively vetoed Clover gamma-detector for nuclear astrophysics at LUNA

    E-Print Network [OSTI]

    LUNA collaboration; T. Szucs; D. Bemmerer; C. Broggini; A. Caciolli; F. Confortola; P. Corvisiero; Z. Elekes; A. Formicola; Zs. Fulop; G. Gervino; A. Guglielmetti; C. Gustavino; Gy. Gyurky; G. Imbriani; M. Junker; A. Lemut; M. Marta; C. Mazzocchi; R. Menegazzo; P. Prati; V. Roca; C. Rolfs; C. Rossi Alvarez; E. Somorjai; O. Straniero; F. Strieder; F. Terrasi; H. P. Trautvetter

    2010-03-31

    An escape-suppressed, composite high-purity germanium detector of the Clover type has been installed at the Laboratory for Underground Nuclear Astrophysics (LUNA) facility, deep underground in the Gran Sasso Laboratory, Italy. The laboratory gamma-ray background of the Clover detector has been studied underground at LUNA and, for comparison, also in an overground laboratory. Spectra have been recorded both for the single segments and for the virtual detector formed by online addition of all four segments. The effect of the escape-suppression shield has been studied as well. Despite their generally higher intrinsic background, escape-suppressed detectors are found to be well suited for underground nuclear astrophysics studies. As an example for the advantage of using a composite detector deep underground, the weak ground state branching of the Ep = 223 keV resonance in the 24Mg(p,gamma)25Al reaction is determined with improved precision.

  19. The 25Mg(p,g)Al reaction at low astrophysical energies

    E-Print Network [OSTI]

    Strieder, F; Formicola, A; Imbriani, G; Junker, M; Bemmerer, D; Best, A; Broggini, C; Caciolli, A; Corvisiero, P; Costantini, H; DiLeva, A; Elekes, Z; Fülöp, Zs; Gervino, G; Guglielmetti, A; Gustavino, C; Gyürky, Gy; Lemut, A; Marta, M; Mazzocchi, C; Menegazzo, R; Prati, P; Roca, V; Rolfs, C; Alvarez, C Rossi; Somorjai, E; Straniero, O; Terrasi, F; Trautvetter, H P

    2011-01-01

    In the present work we report on a new measurement of resonance strengths in the reaction 25Mg(p,gamma)26Al at E_cm= 92 and 189 keV. This study was performed at the LUNA facility in the Gran Sasso underground laboratory using a 4pi BGO summing crystal. For the first time the 92 keV resonance was directly observed and a resonance strength omega-gamma=(2.9+/-0.6)x10E-10 eV was determined. Additionally, the gamma-ray branchings and strength of the 189 keV resonance were studied with a high resolution HPGe detector yielding an omega-gamma value in agreement with the BGO measurement, but 20% larger compared to previous works.

  20. First measurement of the 14N(p,gamma)15O cross section down to 70 keV

    E-Print Network [OSTI]

    Lemut, A; Confortola, F; Bonetti, R; Broggini, C; Corvisiero, P; Costantini, H; Cruz, J; Formicola, A; Fülöp, Z; Gervino, G; Guglielmetti, A; Gustavino, C; Gyürky, G; Imbriani, G; Jesus, A P; Junker, M; Limata, B; Menegazzo, R; Prati, P; Roca, V; Rogalla, D; Rolfs, C; Romano, M; Alvarez, C R; Schumann, F; Somorjai, E; Straniero, O; Strieder, F; Terrasi, F; Trautvetter, H P; Fulop, Zs.; Gyurky, Gy.

    2006-01-01

    In stars with temperatures above 20*10^6 K, hydrogen burning is dominated by the CNO cycle. Its rate is determined by the slowest process, the 14N(p,gamma)15O reaction. Deep underground in Italy's Gran Sasso laboratory, at the LUNA 400 kV accelerator, the cross section of this reaction has been measured at energies much lower than ever achieved before. Using a windowless gas target and a 4pi BGO summing detector, direct cross section data has been obtained down to 70 keV, reaching a value of 0.24 picobarn. The Gamow peak has been covered by experimental data for several scenarios of stable and explosive hydrogen burning. In addition, the strength of the 259 keV resonance has been remeasured. The thermonuclear reaction rate has been calculated for temperatures 90 - 300 *10^6 K, for the first time with negligible impact from extrapolations.

  1. Recherche De Correlations Temporelles Des Muons Cosmiques Avec Macro Et Perte D'Energie Des Nuclearites

    E-Print Network [OSTI]

    Moussa, A

    2009-01-01

    The first parts of the thesis recalls the main features of the large MACRO experiment at the underground Gran Sasso Laboratory. It then describes the atmospheric muons measured by the experiment and the selection criteria to obtain and analyze a large sample of cosmic muons. The time series of MACRO muons was analyzed with two complementary approaches: search for the occurrence of bursts of muon events and search for periodicities in the muon time distribution. The Scan Statistics method was used in the first case and the Lomb-Scargle spectral analysis in the second case. The two techniques complete early analyses performed with "folding" methods. It is confirmed that the seasonal variation is the dominant periodic variation, and one also confirms the solar diurnal and sidereal modulations. A separate study concerns the analysis of the energy losses of the hypothetical Nuclearites in different materials and detectors; their importance for the searches performed by the MACRO and the SLIM experiments is discuss...

  2. The Electronics and Data Acquisition System of the DarkSide Dark Matter Search

    E-Print Network [OSTI]

    Alexander, T; Arisaka, K; Back, H O; Baldin, B; Biery, K; Bonfini, G; Bossa, M; Brigatti, A; Brodsky, J; Budano, F; Cadonati, L; Calaprice, F; Canci, N; Candela, A; Cao, H; Cariello, M; Cavalcante, P; Chavarria, A; Chepurnov, A; Cocco, A G; Crippa, L; D'Angelo, D; D'Incecco, M; Davini, S; De Deo, M; Derbin, A; Devoto, A; Di Eusanio, F; Di Pieto, G; Edkins, E; Empl, A; Fan, A; Fiorillo, G; Fomenko, K; Forster, G; Franco, D; Gabriele, F; Galbiati, C; Goretti, A; Grandi, L; Gromov, M; Guan, M Y; Guardincerri, Y; Hackett, B; Herner, K; Hungerford, E; Ianni, Al; Ianni, An; Jollet, C; Keeter, K; Kendziora, C; Kidner, S; Kobychev, V; Koh, G; Korablev, D; Korga, G; Kurlej, A; Li, P X; Loer, B; Lombardi, P; Love, C; Ludhova, L; Luitz, S; Ma, Y Q; Machulin, I; Mandarano, A; Mari, S M; Maricic, J; Marini, L; Martoff, J; Meregaglia, A; Meroni, E; Meyers, P D; Milincic, R; Montanari, D; Montuschi, M; Monzani, M E; Mosteiro, P; Mount, B; Muratova, V; Musico, P; Nelson, A; Odrowski, S; Okounkoa, M; Orsini, M; Ortica, F; Pagani, L; Pallavicini, M; Pantic, E; Papp, L; Parmeggiano, S; Parsells, Bob; Pelczar, K; Pelliccia, N; Perasso, S; Pocar, A; Pordes, S; Pugachev, D; Qian, H; Randle, K; Ranucci, G; Razeto, A; Reinhold, B; Renshaw, A; Romani, A; Rossi, B; Rossi, N; Rountree, S D; Sablone, D; Saggese, P; Saldanha, R; Sands, W; Sangiorgio, S; Segreto, E; Semenov, D; Shields, E; Skorokhvatov, M; Smirnov, O; Sotnikov, A; Stanford, C; Suvorov,; Tartaglia, R; Tatarowicz, J; Testera, G; Tonazzo, A; Unzhakov, E; Vogelaar, R B; Wada, M; Walker, S E; Wang, H; Wang, Y; Watson, A; Westerdale, S; Wojcik, M; Wright, A; Xiang, X; Xu, J; Yang, C G; Yoo, J; Zavatarelli, S; Zec, A; Zhu, C; Zuzel, G

    2014-01-01

    It is generally inferred from astronomical measurements that Dark Matter (DM) comprises approximately 27\\% of the energy-density of the universe. If DM is a subatomic particle, a possible candidate is a Weakly Interacting Massive Particle (WIMP), and the DarkSide-50 (DS) experiment is a direct search for evidence of WIMP-nuclear collisions. DS is located underground at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, and consists of three active, embedded components; an outer water veto (CTF), a liquid scintillator veto (LSV), and a liquid argon (LAr) time projection chamber (TPC). This paper describes the data acquisition and electronic systems of the DS detectors, designed to detect the residual ionization from such collisions.

  3. Cosmic-muon flux and annual modulation in Borexino at 3800 m water-equivalent depth

    E-Print Network [OSTI]

    G. Bellini; J. Benziger; D. Bick; G. Bonfini; D. Bravo; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; F. Calaprice; C. Carraro; P. Cavalcante; A. Chavarria; A. Chepurnov; D. D'Angelo; S. Davini; A. Derbin; A. Etenko; F. von Feilitzsch; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Goeger-Neff; A. Goretti; L. Grandi; E. Guardincerri; C. Hagner; S. Hardy; Aldo Ianni; Andrea Ianni; D. Korablev; G. Korga; Y. Koshio; D. Kryn; M. Laubenstein; T. Lewke; E. Litvinovich; B. Loer; F. Lombardi; P. Lombardi; L. Ludhova; I. Machulin; S. Manecki; W. Maneschg; G. Manuzio; Q. Meindl; E. Meroni; L. Miramonti; M. Misiaszek; D. Montanari; P. Mosteiro; V. Muratova; L. Oberauer; M. Obolensky; F. Ortica; K. Otis; M. Pallavicini; L. Papp; L. Perasso; S. Perasso; A. Pocar; R. S. Raghavan; G. Ranucci; A. Razeto; A. Re; A. Romani; A. Sabelnikov; R. Saldanha; C. Salvo; S. Schönert; H. Simgen; M. Skorokhvatov; O. Smirnov; A. Sotnikov; S. Sukhotin; Y. Suvorov; R. Tartaglia; G. Testera; D. Vignaud; R. B. Vogelaar; J. Winter; M. Wojcik; A. Wright; M. Wurm; J. Xu; O. Zaimidoroga; S. Zavatarelli; G. Zuzel

    2012-11-22

    We have measured the muon flux at the underground Gran Sasso National Laboratory (3800 m w.e.) to be (3.41 \\pm 0.01) \\times 10-4m-2s-1 using four years of Borexino data. A modulation of this signal is observed with a period of (366\\pm3) days and a relative amplitude of (1.29 \\pm 0.07)%. The measured phase is (179 \\pm 6) days, corresponding to a maximum on the 28th of June. Using the most complete atmospheric data models available, muon rate fluctuations are shown to be positively correlated with atmospheric temperature, with an effective coefficient {\\alpha}T = 0.93 \\pm 0.04. This result represents the most precise study of the muon flux modulation for this site and is in good agreement with expectations.

  4. Borexino

    E-Print Network [OSTI]

    Lino Miramonti

    2006-09-07

    Borexino is a massive calorimetric liquid scintillation detector whose installation has been completed in the underground Gran Sasso Laboratory. The focus of the experiment is on the direct and real time measurement of the flux of neutrinos produced in the $^{7}Be$ electron capture reaction in the Sun. Furthermore, recent studies about the reduction of the $^{11}C$ background through suitable rejection techniques demonstrated the possibility to open an interesting additional observation window in the energy region of the pep and CNO solar neutrinos. Beyond the solar neutrino program, the detector will be also a powerful observatory for antineutrinos from Supernovae, as well as for geoneutrinos, profiting from a very low background from nuclear reactors.

  5. Search for 2? decays of 96Ru and 104Ru by ultra-low background HPGe gamma spectrometry at LNGS: final results

    E-Print Network [OSTI]

    P. Belli; R. Bernabei; F. Cappella; R. Cerulli; F. A. Danevich; S. d'Angelo; A. Incicchitti; G. P. Kovtun; N. G. Kovtun; M. Laubenstein; D. V. Poda; O. G. Polischuk; A. P. Shcherban; D. A. Solopikhin; J. Suhonen; V. I. Tretyak

    2013-02-28

    An experiment to search for double beta decay processes in 96Ru and 104Ru, which are accompanied by gamma rays, has been realized in the underground Gran Sasso National Laboratories of the I.N.F.N. (Italy). Ruthenium samples with masses of about (0.5-0.7) kg were measured with the help of ultra-low background high purity Ge gamma ray spectrometry. After 2162 h of data taking the samples were deeply purified to reduce the internal contamination of 40K. The last part of the data has been accumulated over 5479 h. New improved half life limits on 2\\beta+/\\epsilon \\beta+/2\\epsilon\\ processes in 96Ru have been established on the level of 10^{20} yr, in particular for decays to the ground state of 96Mo: T1/2(2\

  6. Search for time modulations in the decay rate of 40K and 232Th

    E-Print Network [OSTI]

    E. Bellotti; C. Broggini; G. Di Carlo; M. Laubenstein; R. Menegazzo; M. Pietroni

    2014-05-13

    Time modulations at per mil level have been reported to take place in the decay constant of about 15 nuclei with period of one year (most cases) but also of about one month or one day. In this paper we give the results of the activity measurement of a 40K source and a 232Th one. The two experiments have been done at the Gran Sasso Laboratory during a period of about 500 days, above ground (40K) and underground (232Th) with a target sensitivity of a few parts over 10^5. We also give the results of the activity measurement at the time of the X-class solar flares which took place in May 2013. Briefly, our measurements do not show any evidence of unexpected time dependence in the decay rate of 40K and 232Th.

  7. First measurement of the 14N(p,gamma)15O cross section down to 70 keV

    E-Print Network [OSTI]

    A. Lemut; D. Bemmerer; F. Confortola; R. Bonetti; C. Broggini; P. Corvisiero; H. Costantini; J. Cruz; A. Formicola; Zs. Fulop; G. Gervino; A. Guglielmetti; C. Gustavino; Gy. Gyurky; G. Imbriani; A. P. Jesus; M. Junker; B. Limata; R. Menegazzo; P. Prati; V. Roca; D. Rogalla; C. Rolfs; M. Romano; C. Rossi Alvarez; F. Schumann; E. Somorjai; O. Straniero; F. Strieder; F. Terrasi; H. P. Trautvetter

    2006-02-09

    In stars with temperatures above 20*10^6 K, hydrogen burning is dominated by the CNO cycle. Its rate is determined by the slowest process, the 14N(p,gamma)15O reaction. Deep underground in Italy's Gran Sasso laboratory, at the LUNA 400 kV accelerator, the cross section of this reaction has been measured at energies much lower than ever achieved before. Using a windowless gas target and a 4pi BGO summing detector, direct cross section data has been obtained down to 70 keV, reaching a value of 0.24 picobarn. The Gamow peak has been covered by experimental data for several scenarios of stable and explosive hydrogen burning. In addition, the strength of the 259 keV resonance has been remeasured. The thermonuclear reaction rate has been calculated for temperatures 90 - 300 *10^6 K, for the first time with negligible impact from extrapolations.

  8. The Search for Neutrinoless Double Beta Decay in CUORE

    E-Print Network [OSTI]

    L. M. Ejzak; for the CUORE Collaboration

    2009-10-15

    Understanding the nature of neutrino masses will require physics beyond the long-standing Standard Model of particle physics. Neutrinoless double beta decay experiments like the Cryogenic Underground Observatory for Rare Events (CUORE) are uniquely suited for probing the remaining mysteries of neutrino mass, particularly the question of the neutrino's Majorana nature. CUORE will be a next-generation experiment at the Laboratori Nazionali del Gran Sasso in Italy; it will consist of an array of 988 TeO2 detector crystals operated at ~10 mK, following the bolometric technique established by the Cuoricino experiment. It will look for the energy signal produced by the theoretically-predicted neutrinoless double beta decay in Te-130, and therefore reliable energy calibration of the detector is crucial to the experiment's success. We will present the most recent results from Cuoricino and discuss the current status of the CUORE project, with a particular emphasis on the development of the calibration system.

  9. Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay

    E-Print Network [OSTI]

    L. Cardani; L. Gironi; J. W. Beeman; I. Dafinei; Z. Ge; G. Pessina; S. Pirro; Y. Zhu

    2011-06-03

    Bolometers are ideal devices in the search for neutrinoless Double Beta Decay. Enlarging the mass of individual detectors would simplify the construction of a large experiment, but would also decrease the background per unit mass induced by alpha-emitters located close to the surfaces and background arising from external and internal gamma's. We present the very promising results obtained with a 2.13 kg TeO2 crystal. This bolometer, cooled down to a temperature of 10.5 mK in a dilution refrigerator located deep underground in the Gran Sasso National Laboratories, represents the largest thermal detector ever operated. The detector exhibited an energy resolution spanning a range from 3.9 keV (at 145 keV) to 7.8 keV (at the 2615 gamma-line of 208Tl) FWHM. We discuss the decrease in the background per unit mass that can be achieved increasing the mass of a bolometer.

  10. GERDA, a GERmanium Detector Array for the search for neutrinoless {beta}{beta} decay in 76Ge

    SciTech Connect (OSTI)

    Pandola, L.; Tomei, C. [INFN, Laboratori Nazionali del Gran Sasso, S.S. 17 bis km 18.910, 67010 Assergi (AQ) (Italy)

    2006-07-11

    The GERDA project, searching for neutrinoless double beta-decay of 76Ge with enriched germanium detectors submerged in a cryogenic bath, has been approved for installation at the Gran Sasso National Laboratory (LNGS), Italy. The GERDA technique is aiming at a dramatic reduction of the background due to radioactive contaminations of the materials surrounding the detectors. This will lead to a sensitivity of about 1026 years on the half-life of neutrinoless double beta decay. Already in the first phase of the experiment, GERDA will be able to investigate with high statistical significance the claimed evidence for neutrinoless double beta decay of 76Ge based on the data of the Heidelberg-Moscow experiment.

  11. Status of the CUORE and results from the CUORE-0 neutrinoless double beta decay experiments

    E-Print Network [OSTI]

    Sisti, M; Avignone, F T; Azzolini, O; Balata, M; Banks, T I; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Brofferio, C; Bucci, C; Cai, X Z; Camacho, A; Caminata, A; Canonica, L; Cao, X G; Capelli, S; Cappelli, L; Carbone, L; Cardani, L; Casali, N; Cassina, L; Chiesa, D; Chott, N; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, R J; Cushman, J S; Dafinei, I; Dally, A; Datskov, V; Dell'Oro, S; Deninno, M; Di Domizio, S; di Vacri, M L; Drobizhev, A; Ejzak, L; Fang, D Q; Farach, H A; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Fujikawa, B K; Giachero, A; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Gutierrez, T D; Haller, E E; Han, K; Heeger, K M; Hennings-Yeomans, R; Hickerson, K P; Huang, H Z; Kadel, R; Keppel, G; Kolomensky, Yu G; Li, Y L; Ligi, C; Lim, K E; Liu, X; Ma, Y G; Maiano, C; Maino, M; Martinez, M; Maruyama, R H; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nastasi, M; Nisi, S; Nones, C; Norman, E B; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, J L; Pagliarone, C E; Pallavicini, M; Palmieri, V; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Pettinacci, V; Piperno, G; Pira, C; Pirro, S; Pozzi, S; Previtali, E; Rosenfeld, C; Rusconi, C; Sala, E; Sangiorgio, S; Scielzo, N D; Smith, A R; Taffarello, L; Tenconi, M; Terranova, F; Tian, W D; Tomei, C; Trentalange, S; Ventura, G; Vignati, M; Wang, B S; Wang, H W; Wielgus, L; Wilson, J; Winslow, L A; Wise, T; Woodcraft, A; Zanotti, L; Zarra, C; Zhang, G Q; Zhu, B X; Zucchelli, S

    2015-01-01

    CUORE is a 741 kg array of TeO2 bolometers for the search of neutrinoless double beta decay of 130Te. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/keV/kg/y will be reached, in five years of data taking CUORE will have a 1 sigma half life sensitivity of 10E26 y. CUORE-0 is a smaller experiment constructed to test and demonstrate the performances expected for CUORE. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.

  12. Underground nuclear astrophysics: why and how

    E-Print Network [OSTI]

    Best, A; Fülöp, Zs; Gyürky, Gy; Laubenstein, M; Napolitani, E; Rigato, V; Roca, V; Szücs, T

    2016-01-01

    The goal of nuclear astrophysics is to measure cross sections of nuclear physics reactions of interest in astrophysics. At stars temperatures, these cross sections are very low due to the suppression of the Coulomb barrier. Cosmic ray induced background can seriously limit the determination of reaction cross sections at energies relevant to astrophysical processes and experimental setups should be arranged in order to improve the signal-to-noise ratio. Placing experiments in underground sites, however, reduces this background opening the way towards ultra low cross section determination. LUNA (Laboratory for Underground Nuclear Astrophysics) was pioneer in this sense. Two accelerators were mounted at the INFN National Laboratories of Gran Sasso (LNGS) allowing to study nuclear reactions close to stellar energies. A summary of the relevant technology used, including accelerators, target production and characterisation, and background treatment is given.

  13. Impedance issues in the CERN SPS

    SciTech Connect (OSTI)

    Linnecar, T.

    1999-12-03

    The future use of the CERN SPS accelerator as injector for the Large Hadron Collider, LHC, and the possible use of the SPS as a neutrino source for the Gran Sasso experiment are pushing the maximum intensity requirements of the accelerator much higher than achieved up to now. At the same time the requirements on beam quality are becoming far more stringent. The SPS machine, built in the 70's, is not a 'smooth' machine. It contains many discontinuities in vacuum chamber cross-section and many cavity-like objects, as well as the 5 separate RF systems at present installed. All these lead to a high impedance, seen by the beam, spread over a wide frequency range. As a result there is a constant fight against instabilities, both single and multi bunch, as the intensity increases. A program of studies is under way in the SPS to identify, reduce, and remove where possible the sources of these impedances.

  14. GTC optical imaging of extremely red 5C radio galaxies at high redshift

    E-Print Network [OSTI]

    Humphrey, A; Lagos, P

    2015-01-01

    We investigate the nature of seven unusual radio galaxies from the 5C catalogue that were previously known to have extremely red R-K colours, and for which emission lines were previously found to be weak or absent in their optical spectra. We present and discuss u, g, or r images of these radio galaxies, obtained using the Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy (OSIRIS) at the Gran Telescopio Canarias (GTC). We have detected all seven targets in our g-band imaging. Their optical emission is extended, and we tentatively detect a radio-optical alignment effect in this sample. A subset of our sample (three sources) shows broad-band spectral energy distributions that flatten out near the wavelength range of the g-band, implying a dominant contribution there due to young stars and/or scattered or reprocessed radiation from the active nucleus.

  15. Nuclear Processes at Solar Energy

    E-Print Network [OSTI]

    Carlo Broggini

    2003-08-29

    LUNA, Laboratory for Underground Nuclear Astrophysics at Gran Sasso, is measuring fusion cross sections down to the energy of the nucleosynthesis inside stars. Outstanding results obtained up to now are the cross-section measurements within the Gamow peak of the Sun of $^{3}He(^{3}He,2p)^{4}He$ and the $D(p,\\gamma)^{3}He$. The former plays a big role in the proton-proton chain, largely affecting the calculated solar neutrino luminosity, whereas the latter is the reaction that rules the proto-star life during the pre-main sequence phase. The implications of such measurements will be discussed. Preliminary results obtained last year on the study of $^{14}N(p,\\gamma)^{15}O$, the slowest reaction of the CNO cycle, will also be shown.

  16. Ring Nebulae: Tracers of the CNO Nucleosynthesis

    E-Print Network [OSTI]

    Mesa-Delgado, A; García-Rojas, J

    2015-01-01

    Preliminary results are presented from spectroscopic data in the optical range of the Galactic ring nebulae NGC 6888, G2:4+1:4, RCW 58 and Sh2-308. Deep observations with long exposure times were carried out at the 6.5m Clay Telescope and at the 10.4m Gran Telescopio Canarias. In NGC 6888, recombination lines of C II, O II and N II are detected with signal-to-noise ratios higher than 8. The chemical content of NGC 6888 is discussed within the chemical enrichment predicted by evolution models of massive stars. For all nebulae, a forthcoming work will content in-depth details about observations, analysis and final results (Esteban et al. 2015, in prep.).

  17. Exploring the {sup 22}Ne(p,?){sup 23}Na reaction at LUNA and at HZDR

    SciTech Connect (OSTI)

    Cavanna, Francesca [Dipartimento di fisica, Università di Genova, and INFN Sezione di Genova, Genova (Italy); Collaboration: LUNA Collaboration

    2014-05-09

    The {sup 22}Ne(p,?){sup 23}Na reaction is involved in the hydrogen burning NeNa cycle. This determines the nucleosynthesis of the Ne and Na isotopes in the Red Giant Branch and Asymptotic Giant Branch phases of stellar evolution. In the energy range relevant for astrophysics (20 keV < E < 600 keV), the {sup 22}Ne(p,?){sup 23}Na reaction rate is highly uncertain because of the contribution of a large number of resonances never measured directly. A related study is under preparation at the Laboratory for Underground Nuclear Astrophysics (LUNA), in the Gran Sasso National Laboratory, and it will cover the energy range 100 keV < E < 400 keV. Meanwhile, a measurement at higher energies (i.e. 436 keV) has been carried out at the Tandetron accelerator of the HZDR (Helmholtz Zentrum Dresden Rossendorf) in Germany. Some preliminary results will be presented.

  18. Princeton University High Energy Physics Research

    SciTech Connect (OSTI)

    Marlow, Daniel R.

    2015-06-30

    This is the Final Report on research conducted by the Princeton Elementary Particles group over the approximately three-year period from May 1, 2012 to April 30, 2015. The goal of our research is to investigate the fundamental constituents of matter, their fields, and their interactions; to understand the properties of space and time; and to study the profound relationships between cosmology and particle physics. During the funding period covered by this report, the group has been organized into a subgroup concentrating on the theory of particles, strings, and cosmology; and four subgroups performing major experiments at laboratories around the world: CERN, Daya Bay, Gran Sasso as well as detector R\\&D on the Princeton campus. Highlights in of this research include the discovery of the Higgs Boson at CERN and the measurement of $\\sin^22\\theta_{13}$ by the Daya Bay experiment. In both cases, Princeton researchers supported by this grant played key roles.

  19. Preparation and characterisation of isotopically enriched Ta$_2$O$_5$ targets for nuclear astrophysics studies

    E-Print Network [OSTI]

    A. Caciolli; D. A. Scott; A. Di Leva; A. Formicola; M. Aliotta; M. Anders; A. Bellini; D. Bemmerer; C. Broggini; M. Campeggio; P. Corvisiero; R. Depalo; Z. Elekes; Zs. Fülöp; G. Gervino; A. Guglielmetti; C. Gustavino; Gy. Gyürky; G. Imbriani; M. Junker; M. Marta; R. Menegazzo; E. Napolitani; P. Prati; V. Rigato; V. Roca; C. Rolfs; C. Rossi Alvarez; E. Somorjai; C. Salvo; O. Straniero; F. Strieder; T. Szücs; F. Terrasi; H. P. Trautvetter; D. Trezzi

    2012-10-01

    The direct measurement of reaction cross sections at astrophysical energies often requires the use of solid targets of known thickness, isotopic composition, and stoichiometry that are able to withstand high beam currents for extended periods of time. Here, we report on the production and characterisation of isotopically enriched Ta$_2$O$_5$ targets for the study of proton-induced reactions at the Laboratory for Underground Nuclear Astrophysics facility of the Laboratori Nazionali del Gran Sasso. The targets were prepared by anodisation of tantalum backings in enriched water (up to 66% in $^{17}$O and up to 96% in $^{18}$O). Special care was devoted to minimising the presence of any contaminants that could induce unwanted background reactions with the beam in the energy region of astrophysical interest. Results from target characterisation measurements are reported, and the conclusions for proton capture measurements with these targets are drawn.

  20. Analysis of clerical operation by application of work sampling 

    E-Print Network [OSTI]

    Springer, Joy Victor

    1954-01-01

    and that the study wauM have . moused a bettor analysis of tbe olerioal operations? ~pe~&a NO 3AOR OIE ZGEN GO*OH a E 'ETEN EOCENE OIETZGEN CO. L OO ae G&get 1 0 '1. '11 D E ZHfN1, * El 14 1 1 b Il JEW CG Chart 2 t t ~ i. I I l t I t I t ! 1... +- l l t 'I 47 Ghart 38 NO G ION-N OIETEGEN GRAN P LN EUGI I. OIE EGE CO 30 30 /0 I l , ! /0 48 Ghart 83 NO 3 l R D ETSOE 'FN f. Lt I: Lt/l ' Cti i t T . ! 1- . L I fo . L t t -L . l I +- 1 t + X /0 l . l 1 gC 8m...

  1. Borexino: A real time liquid scintillator detector for low energy solar neutrino study

    E-Print Network [OSTI]

    Lino Miramonti

    2002-06-25

    Borexino is a large unsegmented calorimeter featuring 300 tons of liquid scintillator, contained in a 8.5 meter nylon vessel, viewed by 2200 PMTs. The main goal of Borexino is the study, in real time, of low energy solar neutrinos, and in particular, the monoenergetic neutrinos coming from $^7Be$, which is one of the missing links on the solar neutrino problem. The achievement of high radiopurity level, in the order of $10^{-16} g/g$ of U/Th equivalent, necessary to the detection of the low energy component of the solar neutrino flux, was proved in the Borexino prototype: the Counting Test Facility. The detector is located underground in the Laboratori Nazionali del Gran Sasso in the center of Italy at 3500 meter water equivalent depth. In this paper the science and technology of Borexino are reviewed and its main capabilities are presented.

  2. The 3He(alpha,gamma)7Be S-factor at solar energies: the prompt gamma experiment at LUNA

    E-Print Network [OSTI]

    H. Costantini; D. Bemmerer; F. Confortola; A. Formicola; Gy. Gyürky; P. Bezzon; R. Bonetti; C. Broggini; P. Corvisiero; Z. Elekes; Zs. Fülöp; G. Gervino; A. Guglielmetti; C. Gustavino; G. Imbriani; M. Junker; M. Laubenstein; A. Lemut; B. Limata; V. Lozza; M. Marta; R. Menegazzo; P. Prati; V. Roca; C. Rolfs; C. Rossi Alvarez; E. Somorjai; O. Straniero; F. Strieder; F. Terrasi; H. P. Trautvetter

    2008-09-30

    The 3He(alpha,gamma)7Be process is a key reaction in both Big-Bang nucleosynthesis and p-p chain of Hydrogen Burning in Stars. A new measurement of the 3He(alpha,gamma)7Be cross section has been performed at the INFN Gran Sasso underground laboratory by both the activation and the prompt gamma detection methods. The present work reports full details of the prompt gamma detection experiment, focusing on the determination of the systematic uncertainty. The final data, including activation measurements at LUNA, are compared with the results of the last generation experiments and two different theoretical models are used to obtain the S-factor at solar energies.

  3. The Cross Section of 3He(3He,2p)4He measured at Solar Energies

    E-Print Network [OSTI]

    The LUNA Collaboration; M. Junker; A. D'Alessandro; S. Zavatarelli; C. Arpesella; E. Bellotti; C. Broggini; P. Corvisiero; G. Fiorentini; A. Fubini; G. Gervino; U. Greife; C. Gustavino; J. Lambert; P. Prati; W. S. Rodney; C. Rolfs; F. Strieder; H. P. Trautvetter; D. Zahnow

    1998-02-06

    We report on the results of the \\hethet\\ experiment at the underground accelerator facility LUNA (Gran Sasso). For the first time the lowest projectile energies utilized for the cross section measurement correspond to energies below the center of the solar Gamow peak ($E_{\\rm 0}$=22 keV). The data provide no evidence for the existence of a hypothetical resonance in the energy range investigated. Although no extrapolation is needed anymore (except for energies at the low-energy tail of the Gamow peak), the data must be corrected for the effects of electron screening, clearly observed the first time for the \\hethet\\ reaction. The effects are however larger than expected and not understood, leading presently to the largest uncertainty on the quoted $S_{\\rm b}(E_{\\rm 0})$ value for bare nuclides (=5.40 MeV b).

  4. Science and Technology of BOREXINO: A Real Time Detector for Low Energy Solar Neutrinos SOLAR NEUTRINOS

    E-Print Network [OSTI]

    Borexino Collaboration; G. Alimonti

    2000-12-11

    BOREXINO, a real-time device for low energy neutrino spectroscopy is nearing completion of construction in the underground laboratories at Gran Sasso, Italy (LNGS). The experiment's goal is the direct measurement of the flux of 7Be solar neutrinos of all flavors via neutrino-electron scattering in an ultra-pure scintillation liquid. Seeded by a series of innovations which were brought to fruition by large scale operation of a 4-ton test detector at LNGS, a new technology has been developed for BOREXINO. It enables sub-MeV solar neutrino spectroscopy for the first time. This paper describes the design of BOREXINO, the various facilities essential to its operation, its spectroscopic and background suppression capabilities and a prognosis of the impact of its results towards resolving the solar neutrino problem. BOREXINO will also address several other frontier questions in particle physics, astrophysics and geophysics.

  5. Direct Dark Matter Searches with CDMS and XENON

    E-Print Network [OSTI]

    Kaixuan Ni; Laura Baudis

    2006-11-09

    The Cryogenic Dark Matter Search (CDMS) and XENON experiments aim to directly detect dark matter in the form of weakly interacting massive particles (WIMPs) via their elastic scattering on the target nuclei. The experiments use different techniques to suppress background event rates to the minimum, and at the same time, to achieve a high WIMP detection rate. The operation of cryogenic Ge and Si crystals of the CDMS-II experiment in the Soudan mine yielded the most stringent spin-independent WIMP-nucleon cross-section (~10^{-43} cm^2) at a WIMP mass of 60 GeV/c^2. The two-phase xenon detector of the XENON10 experiment is currently taking data in the Gran Sasso underground lab and promising preliminary results were recently reported. Both experiments are expected to increase their WIMP sensitivity by a one order of magnitude in the scheduled science runs for 2007.

  6. A long baseline RICH with a 27-kiloton water target and radiator for detection of neutrino oscillations

    SciTech Connect (OSTI)

    Ypsilantis, T.; Seguinot, J.; Zichichi, A.

    1997-01-01

    A 27 kt water volume is investigated as a target for a long baseline neutrino beam from CERN to Gran Sasso. Charged secondaries from the neutrino interactions produce Cherenkov photons in water which are imaged as rings by a spherical mirror. The photon detector elements are 14 400 photomultipliers (PM`s) of 127 mm diameter or 3600 HPD`s of 250 mm diameter with single photon sensitivity. A coincidence signal of about 300 pixel elements in time with the SPS beam starts readout in bins of 1 ns over a period of 128 ns. Momentum, direction, and velocity of hadrons and mucons are determined from the width, center, and radius of the rings, respectively. Momentum is measured if multiple scattering dominates the ring width, as is the case for most of the particles of interest. Momentum, direction, and velocity of hadrons and muons are determined from the width, center, and radius of the rings, respectively. Momentum is measured if multiple scattering dominates the ring width, as is the case for most of the particles of interest. Momentum resolutions of 1-10%, mass resolutions of 5-50 MeV, and direction resolutions of < 1 mrad are achievable. Thresholds in water for muons, pions, kaons, and protons are 0.12, 0.16, 0.55, and 1.05 GeV/c, respectively. Electrons and gammas can be measured with energy resolution {sigma}{sub E}/E{approx}8.5%/{radical}E(GeV) and with direction resolution {approx} 1 mrad. The detector can be sited either inside a Gran Sasso tunnel or above ground because it is directional and the SPS beam is pulsed; thus the rejection of cosmic ray background is excellent.

  7. Power variation of some integral fractional processes

    E-Print Network [OSTI]

    Corcuera, José Manuel; Nualart, David; Woerner, Jeannette H.C.

    2006-08-01

    Power variation of some integral fractional processes J O S E´ M A N U E L C O R C U E R A 1,* , DAV I D N UA L A RT 1,* * and JEANNETTE H.C. WOERNER2 1Universitat de Barcelona, Gran Via de les Corts Catalanes 585, 08007 Barcelona, Spain. E... ð t 0 jusj p ds ¼ m#1;1þ pH X[mt] j¼1 #3;#3;#3;#3; ð( j=m) ( j#1;1)=m) us dB H s #3;#3;#3;#3; p #1; ju( j#1;1)=m(B Hj=m #1; B H( j#1;1)=m)j p ! þ m#1;1þ pH X[mt] j¼1 ju( j#1;1)=m(B Hj=m #1; B H( j#1;1)=m)j p #1; X[nt] i¼1 ju(i#1;1)=nj p X j2 I n...

  8. Beyond 31 mag/arcsec^2: the low surface brightness frontier with the largest optical telescopes

    E-Print Network [OSTI]

    Trujillo, Ignacio

    2015-01-01

    The detection of optical surface brightness structures in the sky with magnitudes fainter than 30 mag/arcsec^2 (3sigma in 10x10 arcsec boxes; r-band) has remained elusive in current photometric deep surveys. Here we show how present-day 10 meter class telescopes can provide broadband imaging 1.5-2 mag deeper than most previous results within a reasonable amount of time (i.e. <10h on source integration). In particular, we illustrate the ability of the 10.4 m Gran Telescopio de Canarias (GTC) telescope to produce imaging with a limiting surface brightness of 31.5 mag/arcsec^2 (3sigma in 10x10 arcsec boxes; r-band) using 8.1 hours on source. We apply this power to explore the stellar halo of the galaxy UGC00180, a galaxy analogous to M31 located at ~150 Mpc, by obtaining a surface brightness radial profile down to mu_r~33 mag/arcsec^2. This depth is similar to that obtained using star counts techniques of Local Group galaxies, but is achieved at a distance where this technique is unfeasible. We find that the ...

  9. Purification of lanthanides for double beta decay experiments

    SciTech Connect (OSTI)

    Polischuk, O. G.; Barabash, A. S.; Belli, P.; Bernabei, R.; Boiko, R. S.; Danevich, F. A.; Mokina, V. M.; Poda, D. V.; Tretyak, V. I.; Cappella, F.; Incicchitti, A.; Cerulli, R.; Laubenstein, M.; Nisi, S.

    2013-08-08

    There are several potentially double beta active isotopes among the lanthanide elements. However, even high purity grade lanthanide compounds contain {sup 238}U, {sup 226}Ra and {sup 232,228}Th typically on the level of ? (0.1 - 1) Bq/kg. The liquid-liquid extraction technique was used to remove traces of U, Ra and Th from CeO{sub 2}, Nd{sub 2}O{sub 3} and Gd{sub 2}O{sub 3}. The radioactive contamination of the samples before and after the purification was tested by using ultra-low-background HPGe ? spectrometry at the underground Gran Sasso National Laboratories of the INFN (Italy). After the purification the radioactive contamination of gadolinium oxide by Ra and Th was decreased at least one order of magnitude. The efficiency of the approach to purify cerium oxide from Ra was on same level, while the radioactive contamination of neodymium sample before and after the purification is below the sensitivity of analytical methods. The purification method is much less efficient for chemically very similar radioactive elements like lanthanum, lutetium and actinium. R and D of the methods to remove the pollutions with improved efficiency is in progress.

  10. Oxygen contamination in liquid Argon: combined effects on ionization electron charge and scintillation light

    E-Print Network [OSTI]

    R. Acciarri; M. Antonello; B. Baibussinov; M. Baldo-Ceolin; P. Benetti; F. Calaprice; E. Calligarich; M. Cambiaghi; N. Canci; F. Carbonara; F. Cavanna; S. Centro; A. G. Cocco; F. Di Pompeo; G. Fiorillo; C. Galbiati; V. Gallo; L. Grandi; G. Meng; I. Modena; C. Montanari; O. Palamara; L. Pandola; F. Pietropaolo; G. L. Raselli; M. Roncadelli; M. Rossella; C. Rubbia; E. Segreto; A. M. Szelc; F. Tortorici; S. Ventura; C. Vignoli

    2008-04-08

    A dedicated test of the effects of Oxygen contamination in liquid Argon has been performed at the INFN-Gran Sasso Laboratory (LNGS, Italy) within the WArP R&D program. Two detectors have been used: the WArP 2.3 lt prototype and a small (0.7 lt) dedicated detector, coupled with a system for the injection of controlled amounts of gaseous Oxygen. Purpose of the test with the 0.7 lt detector is to detect the reduction of the long-lived component lifetime of the Argon scintillation light emission at increasing O2 concentration. Data from the WArP prototype are used for determining the behavior of both the ionization electron lifetime and the scintillation long-lived component lifetime during the O2-purification process activated in closed loop during the acquisition run. The electron lifetime measurements allow to infer the O2 content of the Argon and correlate it with the long-lived scintillation lifetime data. The effect of Oxygen contamination on the scintillation light has been thus measured over a wide range of O2 concentration, spanning from about 10^-3 ppm up to about 10 ppm. The rate constant of the light quenching process induced by Oxygen in LAr has been found to be k'(O2)=0.54+-0.03 micros^-1 ppm^-1.

  11. Radioactive contamination of ZnWO4 crystal scintillators

    E-Print Network [OSTI]

    P. Belli; R. Bernabei; F. Cappella; R. Cerulli; F. A. Danevich; A. M. Dubovik; S. d'Angelo; E. N. Galashov; B. V. Grinyov; A. Incicchitti; V. V. Kobychev; M. Laubenstein; L. L. Nagornaya; F. Nozzoli; D. V. Poda; R. B. Podviyanuk; O. G. Polischuk; D. Prosperi; V. N. Shlegel; V. I. Tretyak; I. A. Tupitsyna; Ya. V. Vasiliev; Yu. Ya. Vostretsov

    2010-09-05

    The radioactive contamination of ZnWO4 crystal scintillators has been measured deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN in Italy with a total exposure 3197 kg x h. Monte Carlo simulation, time-amplitude and pulse-shape analyses of the data have been applied to estimate the radioactive contamination of the ZnWO4 samples. One of the ZnWO4 crystals has also been tested by ultra-low background gamma spectrometry. The radioactive contaminations of the ZnWO4 samples do not exceed 0.002 -- 0.8 mBq/kg (depending on the radionuclide), the total alpha activity is in the range: 0.2 - 2 mBq/kg. Particular radioactivity, beta active 65Zn and alpha active 180W, has been detected. The effect of the re-crystallization on the radiopurity of the ZnWO4 crystal has been studied. The radioactive contamination of samples of the ceramic details of the set-ups used in the crystals growth has been checked by low background gamma spectrometry. A project scheme on further improvement of the radiopurity level of the ZnWO4 crystal scintillators is briefly addressed.

  12. Effects of Nitrogen contamination in liquid Argon

    E-Print Network [OSTI]

    R. Acciarri; M. Antonello; B. Baibussinov; M. Baldo-Ceolin; P. Benetti; F. Calaprice; E. Calligarich; M. Cambiaghi; N. Canci; F. Carbonara; F. Cavanna; S. Centro; A. G. Cocco; F. Di Pompeo; G. Fiorillo; C. Galbiati; V. Gallo; L. Grandi; G. Meng; I. Modena; C. Montanari; O. Palamara; L. Pandola; F. Pietropaolo; G. L. Raselli; M. Roncadelli; M. Rossella; C. Rubbia; E. Segreto; A. M. Szelc; S. Ventura; C. Vignoli

    2008-04-08

    A dedicated test of the effects of Nitrogen contamination in liquid Argon has been performed at the INFN-Gran Sasso Laboratory (LNGS, Italy) within the WArP R&D program. A detector has been designed and assembled for this specific task and connected to a system for the injection of controlled amounts of gaseous Nitrogen into the liquid Argon. Purpose of the test is to detect the reduction of the Ar scintillation light emission as a function of the amount of the Nitrogen contaminant injected in the Argon volume. A wide concentration range, spanning from about 10^-1 ppm up to about 10^3 ppm, has been explored. Measurements have been done with electrons in the energy range of minimum ionizing particles (gamma-conversion from radioactive sources). Source spectra at different Nitrogen contaminations are analyzed, showing sensitive reduction of the scintillation yield at increasing concentrations. The rate constant of the light quenching process induced by Nitrogen in liquid Ar has been found to be k(N2)=0.11 micros^-1 ppm^-1. Direct PMT signals acquisition at high time resolution by fast Waveform recording allowed to extract with high precision the main characteristics of the scintillation light emission in pure and contaminated LAr. In particular, the decreasing behavior in lifetime and relative amplitude of the slow component is found to be appreciable from O(1 ppm) of Nitrogen concentrations.

  13. On the dust environment of Main-Belt Comet 313P/Gibbs

    E-Print Network [OSTI]

    Pozuelos, F J; Licandro, J; Moreno, F

    2015-01-01

    We present observations carried out using the 10.4 m Gran Telescopio Canarias and an interpretative model of the dust environment of activated asteroid 313P/Gibbs. We discuss three different models relating to different values of the dust parameters, i.e, dust loss rate, maximum and minimum sizes of particles, power index of the size distribution, and emission pattern. The best model corresponds with an isotropic emission of particles which started on August 1st. The size of grains were in the range of $0.1-2000$ $\\mu$m, with velocities for 100 $\\mu$m particles between $0.4-1.9$ m$~$s$^{-1}$, with a dust production rate in the range of $0.2-0.8$ kg$~$s$^{-1}$. The dust tails' brightness and morphology are best interpreted in terms of a model of sustained and low dust emission driven by water-ice sublimation, spanning since 2014 August 1st, and triggered by a short impulsive event. This event produced an emission of small particles of about 0.1 $\\mu$m with velocities of $\\sim$4 m$~$s$^{-1}$. From our model we ...

  14. A deep look at the nuclear region of UGC 5101 through high angular resolution mid-IR data with GTC/CanariCam

    E-Print Network [OSTI]

    Martínez-Paredes, M; Aretxaga, I; Almeida, C Ramos; Hernán-Caballero, A; González-Martín, O; Pereira-Santaella, M; Packham, C; Ramos, A Asensio; Díaz-Santos, T; Elitzur, M; Esquej, P; García-Bernete, I; Imanishi, M; Levenson, N A; Espinosa, J M Rodríguez

    2015-01-01

    We present an analysis of the nuclear infrared (IR, 1.6 to 18 $\\mu$m) emission of the ultraluminous IR galaxy UGC 5101 to derive the properties of its active galactic nucleus (AGN) and its obscuring material. We use new mid-IR high angular resolution ($0.3-0.5$ arcsec) imaging using the Si-2 filter ($\\lambda_{C}=8.7\\, \\mu$m) and $7.5-13$ $\\mu$m spectroscopy taken with CanariCam (CC) on the 10.4m Gran Telescopio CANARIAS. We also use archival HST/NICMOS and Subaru/COMICS imaging and Spitzer/IRS spectroscopy. We estimate the near- and mid-IR unresolved nuclear emission by modelling the imaging data with GALFIT. We decompose the Spitzer/IRS and CC spectra using a power-law component, which represents the emission due to dust heated by the AGN, and a starburst component, both affected by foreground extinction. We model the resulting unresolved near- and mid-IR, and the starburst subtracted CC spectrum with the CLUMPY torus models of Nenkova et al. The derived geometrical properties of the torus, including the lar...

  15. The low-temperature energy calibration system for the CUORE bolometer array

    E-Print Network [OSTI]

    S. Sangiorgio; L. M. Ejzak; K. M. Heeger; R. H. Maruyama; A. Nucciotti; M. Olcese; T. S. Wise; A. L. Woodcraft

    2009-08-03

    The CUORE experiment will search for neutrinoless double beta decay (0nDBD) of 130Te using an array of 988 TeO_2 bolometers operated at 10 mK in the Laboratori Nazionali del Gran Sasso (Italy). The detector is housed in a large cryogen-free cryostat cooled by pulse tubes and a high-power dilution refrigerator. The TeO_2 bolometers measure the event energies, and a precise and reliable energy calibration is critical for the successful identification of candidate 0nDBD and background events. The detector calibration system under development is based on the insertion of 12 gamma-sources that are able to move under their own weight through a set of guide tubes that route them from deployment boxes on the 300K flange down into position in the detector region inside the cryostat. The CUORE experiment poses stringent requirements on the maximum heat load on the cryostat, material radiopurity, contamination risk and the ability to fully retract the sources during normal data taking. Together with the integration into a unique cryostat, this requires careful design and unconventional solutions. We present the design, challenges, and expected performance of this low-temperature energy calibration system.

  16. Measurement of the solar 8B neutrino rate with a liquid scintillator target and 3 MeV energy threshold in the Borexino detector

    E-Print Network [OSTI]

    The Borexino Collaboration

    2010-05-06

    We report the measurement of electron neutrino elastic scattering from 8B solar neutrinos with 3 MeV energy threshold by the Borexino detector in Gran Sasso (Italy). The rate of solar neutrino-induced electron scattering events above this energy in Borexino is 0.217 +- 0.038 (stat) +- 0.008 (syst) cpd/100 t, which corresponds to the equivalent unoscillated flux of (2.4 +- 0.4 (stat) +- 0.1 (syst))x10^6 cm^-2 s^-1, in good agreement with measurements from SNO and SuperKamiokaNDE. Assuming the 8B neutrino flux predicted by the high metallicity Standard Solar Model, the average 8B neutrino survival probability above 3 MeV is measured to be 0.29+-0.10. The survival probabilities for 7Be and 8B neutrinos as measured by Borexino differ by 1.9 sigma. These results are consistent with the prediction of the MSW-LMA solution of a transition in the solar electron neutrino survival probability between the low energy vacuum-driven and the high-energy matter-enhanced solar neutrino oscillation regimes.

  17. Enriched $^{82}$Se for the LUCIFER experiment

    E-Print Network [OSTI]

    Beeman, J W; Benetti, P; Cardani, L; Casali, N; Chiesa, D; Clemenza, M; Dafinei, I; Di Domizio, S; Ferroni, F; Gironi, L; Giuliani, A; Gotti, C; Laubenstein, M; Maino, M; Nagorny, S; Nisi, S; Nones, C; Orio, F; Pagnanini, L; Pattavina, L; Pessina, G; Piperno, G; Pirro, S; Previtali, E; Rusconi, C; Schäffner, K; Tomei, C; Vignati, M

    2015-01-01

    The LUCIFER project aims at deploying the first array of enriched scintillating bolometers for the investigation of neutrinoless double-beta decay of $^{82}$Se. The matrix which embeds the source is an array of ZnSe crystals, where enriched $^{82}$Se is used as decay isotope. The radiopurity of the initial components employed for manufacturing crystals, that can be operated as bolometers, is crucial for achieving a null background level in the region of interest for double-beta decay investigations. In this work, we evaluated the radioactive content in 2.5 kg of 96.3% enriched $^{82}$Se metal, measured with a high-purity germanium detector at the Gran Sasso deep underground laboratory. The limits on internal contaminations of primordial decay chain elements of $^{232}$Th, $^{238}$U and $^{235}$U are respectively: $<$61 $\\mu$Bq/kg, $<$110 $\\mu$Bq/kg and $<$74 $\\mu$Bq/kg at 90% C.L.. The extremely low-background conditions in which the measurement was carried out and the high radiopurity of the $^{82}$...

  18. Enriched $^{82}$Se for the LUCIFER experiment

    E-Print Network [OSTI]

    J. W. Beeman; F. Bellini; P. Benetti; L. Cardani; N. Casali; D. Chiesa; M. Clemenza; I. Dafinei; S. Di Domizio; F. Ferroni; L. Gironi; A. Giuliani; C. Gotti; M. Laubenstein; M. Maino; S. Nagorny; S. Nisi; C. Nones; F. Orio; L. Pagnanini; L. Pattavina; G. Pessina; G. Piperno; S. Pirro; E. Previtali; C. Rusconi; K. Schäffner; C. Tomei; M. Vignati

    2015-08-07

    The LUCIFER project aims at deploying the first array of enriched scintillating bolometers for the investigation of neutrinoless double-beta decay of $^{82}$Se. The matrix which embeds the source is an array of ZnSe crystals, where enriched $^{82}$Se is used as decay isotope. The radiopurity of the initial components employed for manufacturing crystals, that can be operated as bolometers, is crucial for achieving a null background level in the region of interest for double-beta decay investigations. In this work, we evaluated the radioactive content in 2.5 kg of 96.3% enriched $^{82}$Se metal, measured with a high-purity germanium detector at the Gran Sasso deep underground laboratory. The limits on internal contaminations of primordial decay chain elements of $^{232}$Th, $^{238}$U and $^{235}$U are respectively: $<$61 $\\mu$Bq/kg, $<$110 $\\mu$Bq/kg and $<$74 $\\mu$Bq/kg at 90% C.L.. The extremely low-background conditions in which the measurement was carried out and the high radiopurity of the $^{82}$Se allowed us to establish the most stringent lower limits on the half-lives of the double-beta decay of $^{82}$Se to 0$^+_1$, 2$^+_2$ and 2$^+_1$ excited states of $^{82}$Kr of 3.4$\\cdot$10$^{22}$ y, 1.3$\\cdot$10$^{22}$ y and 1.0$\\cdot$10$^{22}$ y, respectively, with a 90% C.L..

  19. Low radioactivity argon dark matter search results from the DarkSide-50 experiment

    E-Print Network [OSTI]

    Agnes, P; Albuquerque, I F M; Alexander, T; Alton, A K; Arisaka, K; Back, H O; Baldin, B; Biery, K; Bonfini, G; Bossa, M; Bottino, B; Brigatti, A; Brodsky, J; Budano, F; Bussino, S; Cadeddu, M; Cadonati, L; Cadoni, M; Calaprice, F; Canci, N; Candela, A; Cao, H; Cariello, M; Carlini, M; Catalanotti, S; Cavalcante, P; Chepurnov, A; Cocco, A G; Covone, G; Crippa, L; D'Angelo, D; D'Incecco, M; Davini, S; De Cecco, S; De Deo, M; De Vincenzi, M; Derbin, A; Devoto, 25 A; Di Eusanio, F; Di Pietro, G; Edkins, E; Empl, A; Fan, A; Fiorillo, G; Fomenko, K; Forster, G; Franco, D; Gabriele, F; Galbiati, C; Giganti, C; Goretti, A M; Granato, F; Grandi, L; Gromov, M; Guan, M; Guardincerri, Y; Hackett, B R; Herner, K; Hungerford, E V; Ianni, Al; Ianni, An; James, I; Jollet, C; Keeter, K; Kendziora, C L; Kobychev, V; Koh, G; Korablev, D; Korga, G; Kubankin, A; Li, X; Lissia, M; Lombardi, P; Luitz, S; Ma, Y; Machulin, I N; Mandarano, A; Mari, S M; Maricic, J; Marini, L; Martoff, C J; Meregaglia, A; Meyers, P D; Miletic, T; Milincic, R; Montanari, D; Monte, A; Montuschi, M; Monzani, M; Mosteiro, P; Mount, B J; Muratova, V N; Musico, P; Napolitano, J; Nelson, A; Odrowski, S; Orsini, M; Ortica, F; Pagani, L; Pallavicini, M; Pantic, E; Parmeggiano, S; Pelczar, K; Pelliccia, N; Perasso, S; Pocar, A; Pordes, S; Pugachev, D A; Qian, H; Randle, K; Ranucci, G; Razeto, A; Reinhold, B; Renshaw, A L; Romani, A; Rossi, B; Rossi, N; Rountree, D; Sablone, D; Saggese, P; Saldanha, R; Sands, W; Sangiorgio, S; Savarese, C; Segreto, E; Semenov, D A; Shields, E; Singh, P N; Skorokhvatov, M D; Smallcomb, M; Smirnov, O; Sotnikov, A; Stanford, C; Suvorov, Y; Tartaglia, R; Tatarowicz, J; Testera, G; Tonazzo, A; Trinchese, P; Unzhakov, E V; Vishneva, A; Vogelaar, B; Wada, M; Walker, S; Wang, H; Wang, Y; Watson, A W; Westerdale, S; Wilhelmi, J; Wojcik, M M; Xiang, X; Xu, J; Yang, C; Yoo, J; Zavatarelli, S; Zec, A; Zhong, W; Zhu, C; Zuzel, G

    2015-01-01

    The DarkSide-50 dark matter search reports the first results obtained using a target of low-radioactivity argon extracted from underground sources. The experiment is located at the Laboratori Nazionali del Gran Sasso and uses a two-phase time projection chamber as a detector. A total of 155 kg of low radioactivity argon has been obtained, and we have determined that underground argon is depleted in Ar-39 by a factor (1.4 +- 0.2) x 10^3 relative to atmospheric argon. The underground argon was also found to contain (2.05 +- 0.13) mBq/kg of Kr-85. We found no evidence for dark matter in the form of WIMPs in 70.9 live-days of data with a fiducial mass of (36.9 +- 0.6) kg. When combined with our preceding search with an atmospheric argon target, we set a 90 % C.L. upper limit on the WIMP-nucleon spin-independent cross section of 2.0 x 10^-44 cm^2 (8.6 x 10^-44 cm^2, 8.0 x 10^-43 cm^2 ) for a WIMP mass of 100 GeV/c^2 (1 TeV/c^2 , 10 TeV/c^2 ).

  20. Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth

    E-Print Network [OSTI]

    G. Bellini; J. Benziger; D. Bick; G. Bonfini; D. Bravo; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; F. Calaprice; P. Cavalcante; A. Chavarria; A. Chepurnov; D. D'Angelo; S. Davini; A. Derbin; A. Empl; A. Etenko; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Göger-Neff; A. Goretti; L. Grandi; C. Hagner; E. Hungerford; Aldo Ianni; Andrea Ianni; V. Kobychev; D. Korablev; G. Korga; D. Kryn; M. Laubenstein; T. Lewke; E. Litvinovich; B. Loer; P. Lombardi; F. Lombardi; L. Ludhova; G. Lukyanchenko; I. Machulin; S. Manecki; W. Maneschg; G. Manuzio; Q. Meindl; E. Meroni; L. Miramonti; M. Misiaszek; R. Möllenberg; P. Mosteiro; V. Muratova; L. Oberauer; M. Obolensky; F. Ortica; K. Otis; M. Pallavicini; L. Papp; L. Perasso; S. Perasso; A. Pocar; G. Ranucci; A. Razeto; A. Re; A. Romani; N. Rossi; R. Saldanha; C. Salvo; S. Schönert; H. Simgen; M. Skorokhvatov; O. Smirnov; A. Sotnikov; S. Sukhotin; Y. Suvorov; R. Tartaglia; G. Testera; D. Vignaud; R. B. Vogelaar; F. von Feilitzsch; J. Winter; M. Wojcik; A. Wright; M. Wurm; J. Xu; O. Zaimidoroga; S. Zavatarelli; G. Zuzel

    2013-07-03

    The solar neutrino experiment Borexino, which is located in the Gran Sasso underground laboratories, is in a unique position to study muon-induced backgrounds in an organic liquid scintillator. In this study, a large sample of cosmic muons is identified and tracked by a muon veto detector external to the liquid scintillator, and by the specific light patterns observed when muons cross the scintillator volume. The yield of muon-induced neutrons is found to be Yn =(3.10+-0.11)10-4 n/({\\mu} (g/cm2)). The distance profile between the parent muon track and the neutron capture point has the average value {\\lambda} = (81.5 +- 2.7)cm. Additionally the yields of a number of cosmogenic radioisotopes are measured for 12N, 12B, 8He, 9C, 9Li, 8B, 6He, 8Li, 11Be, 10C and 11C. All results are compared with Monte Carlo simulation predictions using the Fluka and Geant4 packages. General agreement between data and simulation is observed for the cosmogenic production yields with a few exceptions, the most prominent case being 11C yield for which both codes return about 50% lower values. The predicted {\\mu}-n distance profile and the neutron multiplicity distribution are found to be overall consistent with data.

  1. Spontaneous Muon Emission during Fission, a New Nuclear Radioactivity

    E-Print Network [OSTI]

    D. B. Ion; M. L. D. Ion; Reveica Ion-Mihai

    2011-01-24

    In this paper the essential theoretical predictions for the nuclear muonic radioactivity are presented by using a special fission-like model similar with that used in description of the pionic emission during fission. Hence, a fission-like model for the muonic radioactivity takes into account the essential degree of freedom of the system: muon-fissility, muon-fission barrier height, etc. Using this model it was shown that most of the SHE-nuclei lie in the region where the muonic fissility parameters attain their limiting value X=1. Hence, the SHE-region is characterized by the absence of a classical barrier toward spontaneous muon and pion emissions. Numerical estimations on the yields for the natural muonic radioactivities of the transuranium elements as well numerical values for barrier heights are given only for even-even parent nuclei. Some experimental results from LCP-identification emission spectrum are reviewed. Also, the experimental results obtained by Khryachkov et al, using new spectrometer for investigation of ternary nuclear fission, are presented. The OPERA-experiment proposed to perform search for muonic radioactivity from lead nuclei, in the low background conditions offered by the Gran Sasso underground Laboratory (LNGS), is discussed.

  2. Constraints on the evolutionary mechanisms of massive galaxies since z~1 from their velocity dispersions

    E-Print Network [OSTI]

    de Arriba, L Peralta; Trujillo, I; Falcón-Barroso, J; Tapia, T; Cardiel, N; Gallego, J; Guzmán, R; Hempel, A; Martín-Navarro, I; Pérez-González, P G; Sánchez-Bláquez, P

    2015-01-01

    Several authors have reported that the dynamical masses of massive compact galaxies (M_star > 10^11 M_sun, r_e ~ 1 kpc), computed as M_dyn = 5.0 sigma_e^2 r_e / G, are lower than their stellar masses M_star. In a previous study from our group, the discrepancy is interpreted as a breakdown of the assumptions of virial equilibrium and homology that underlie the M_dyn determinations. Here we present new spectroscopy of six redshift z~1.0 massive compact ellipticals from the Extended Groth Strip, obtained with the 10.4-m Gran Telescopio Canarias. We obtain velocity dispersions in the range 161 to 340 km s^-1. As found by previous studies of massive compact galaxies, our velocity dispersions are lower than the virial expectation, and all of our galaxies show M_dyn < M_star. Adding data from the literature, we build a sample covering a range of stellar masses and compactness in a narrow redshift range z~1.0. This allows us to exclude systematic effects on the data and evolutionary effects on the galaxy populatio...

  3. Search for long-lived superheavy eka-tungsten with radiopure ZnWO$_4$ crystal scintillator

    E-Print Network [OSTI]

    P. Belli; R. Bernabei; F. Cappella; R. Cerulli; F. A. Danevich; V. Yu. Denisov; A. d'Angelo; A. Incicchitti; V. V. Kobychev; D. V. Poda; O. G. Polischuk; V. I. Tretyak

    2015-04-28

    The data collected with a radioactively pure ZnWO$_4$ crystal scintillator (699 g) in low background measurements during 2130 h at the underground (3600 m w.e.) Laboratori Nazionali del Gran Sasso (INFN, Italy) were used to set a limit on possible concentration of superheavy eka-W (seaborgium Sg, Z = 106) in the crystal. Assuming that one of the daughters in a chain of decays of the initial Sg nucleus decays with emission of high energy $\\alpha$ particle ($Q_\\alpha > 8$ MeV) and analyzing the high energy part of the measured $\\alpha$ spectrum, the limit N(Sg)/N(W) < 5.5 $\\times$ 10$^{-14}$ atoms/atom at 90% C.L. was obtained (for Sg half-life of 10$^9$ yr). In addition, a limit on the concentration of eka-Bi was set by analysing the data collected with a large BGO scintillation bolometer in an experiment performed by another group [L. Cardani et al., JINST 7 (2012) P10022]: N(eka-Bi)/N(Bi) < 1.1 $\\times$ 10$^{-13}$ atoms/atom with 90% C.L. Both the limits are comparable with those obtained in recent experiments which instead look for spontaneous fission of superheavy elements or use the accelerator mass spectrometry.

  4. CALDER - Neutrinoless double-beta decay identification in TeO$_2$ bolometers with kinetic inductance detectors

    E-Print Network [OSTI]

    E. S. Battistelli; F. Bellini; C. Bucci; M. Calvo; L. Cardani; N. Casali; M. G. Castellano; I. Colantoni; A Coppolecchia; C. Cosmelli; A. Cruciani; P. de Bernardis; S. Di Domizio; A. D'Addabbo; M. Martinez; S. Masi; L. Pagnanini; C. Tomei; M. Vignati

    2015-05-19

    Next-generation experiments searching for neutrinoless double-beta decay must be sensitive to a Majorana neutrino mass as low as 10 meV. CUORE, an array of 988 TeO$_2$ bolometers being commissioned at Laboratori Nazionali del Gran Sasso in Italy, features an expected sensitivity of 50-130 meV at 90% C.L, that can be improved by removing the background from $\\alpha$ radioactivity. This is possible if, in coincidence with the heat release in a bolometer, the Cherenkov light emitted by the $\\beta$ signal is detected. The amount of light detected is so far limited to only 100 eV, requiring low-noise cryogenic light detectors. The CALDER project (Cryogenic wide-Area Light Detectors with Excellent Resolution) aims at developing a small prototype experiment consisting of TeO$_2$ bolometers coupled to new light detectors based on kinetic inductance detectors. The R&D is focused on the light detectors that could be implemented in a next-generation neutrinoless double-beta decay experiment.

  5. Operation of a GERDA Phase I prototype detector in liquid argon and nitrogen

    E-Print Network [OSTI]

    M. Barnabé Heider; A. Bakalyarov; L. Bezrukov; C. Cattadori; O. Chkvorets; K. Gusev; M. Hult; I. Kirpichnikov; V. Lebedev; G. Marissens; P. Peiffer; S. Schönert; M. Shirchenko; A. Smolnikov; A. Vasenko; S. Vasiliev; S. Zhukov

    2008-12-20

    The GERDA (GERmanium Detector Array) experiment aiming to search for the neutrinoless double beta decay of 76Ge at the Laboratori Nazionali Del Gran Sasso (LNGS), Italy, will operate bare enriched high-purity germanium (HPGe) detectors in liquid argon. GERDA Phase I will use the enriched diodes from the previous Heidelberg-Moscow (HdM) and IGEX experiments. With the HPGe detectors mounted in a low-mass holder, GERDA aims at an excellent energy resolution and extremely low background. The goal is to check the claim for the neutrinoless double beta decay evidence in the HdM 76Ge experiment within one year of data taking. Before dismounting the enriched diodes from their cryostat, the performance parameters of the HdM and the IGEX detectors have been measured. The diodes have been removed from their cryostats, their dimensions measured and they have been put under va-cuum in a transportation container. They are now being refurbished for GERDA Phase I at Canberra Semiconductor NV. Before operating the enriched diodes, a non-enriched HPGe p-type detector mounted in a low-mass holder is operated in the liquid argon test facility of the GERDA Detector Laboratory (GDL) at LNGS. Since January 2006, the testing of the prototype detector is being carried out in the GDL as well as at the site of the detector manufacturer.

  6. Neutron Scattering Facility for Characterization of CRESST and EURECA Detectors at mK Temperatures

    E-Print Network [OSTI]

    J. -C. Lanfranchi; C. Ciemniak; C. Coppi; F. von Feilitzsch; A. Gütlein; H. Hagn; C. Isaila; J. Jochum; M. Kimmerle; S. Pfister; W. Potzel; W. Rau; S. Roth; K. Rottler; C. Sailer; S. Scholl; I. Usherov; W. Westphal

    2008-10-01

    CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) is an experiment located at the Gran Sasso underground laboratory and aimed at the direct detection of dark matter in the form of WIMPs. The setup has just completed a one year commissioning run in 2007 and is presently starting a physics run with an increased target mass. Scintillating $\\mathrm{CaWO_4}$ single crystals, operated at temperatures of a few millikelvin, are used as target to detect the tiny nuclear recoil induced by a WIMP. The powerful background identification and rejection of $\\alpha$, e$^{-}$ and $\\gamma$ events is realized via the simultaneous measurement of a phonon and a scintillation signal generated in the $\\mathrm{CaWO_4}$ crystal. However, neutrons could still be misidentified as a WIMP signature. Therefore, a detailed understanding of the individual recoil behaviour in terms of phonon generation and scintillation light emission due to scattering on Ca, O or W nuclei, respectively, is mandatory. The only setup which allows to perform such measurements at the operating temperature of the CRESST detectors has been installed at the Maier-Leibnitz-Accelerator Laboratory in Garching and is presently being commissioned. The design of this neutron scattering facility is such that it can also be used for other target materials, e.g. $\\mathrm{ZnWO_4}$, $\\mathrm{PbWO_4}$ and others as foreseen in the framework of the future multitarget tonne-scale experiment EURECA (European Underground Rare Event Calorimeter Array).

  7. GERDA phase II detectors: Behind the production and characterisation at low background conditions

    SciTech Connect (OSTI)

    Maneschg, Werner [Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)] [Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Collaboration: GERDA Collaboration; and others

    2013-08-08

    The low background GERmanium Detector Array (GERDA) at Laboratori Nazionali del Gran Sasso (LNGS) is designed to search for the rare neutrinoless double beta decay (0???) in {sup 76}Ge. Bare germanium diodes are operated in liquid argon which is used as coolant, as passive and soon active as well shield against external radiation. Currently, Phase I of the experiment is running using ?15 kg of co-axial High Purity Germanium diodes. In order to increase the sensitivity of the experiment 30 Broad Energy Germanium (BEGe) diodes will be added within 2013. This presentation reviews the production chain of the new BEGe detectors from isotopic enrichment to diode production and testing. As demonstrated all steps were carefully planned in order to minimize the exposure of the enriched germanium to cosmic radiation. Following this premise, acceptance and characterisation measurement of the newly produced diodes have been performed within the HEROICA project in the Belgian underground laboratory HADES close to the diode manufacturer. The test program and the results from a subset of the recently terminated GERDA Phase II BEGe survey will be presented.

  8. Prompt Gamma Rays in {sup 77}Ge after Neutron Capture on {sup 76}Ge

    SciTech Connect (OSTI)

    Meierhofer, Georg; Grabmayr, Peter; Jochum, Josef [Physikalisches Institut, Eberhard Karls Universitaet Tuebingen, Auf der Morgenstelle 14, 72076 Tuebingen (Germany); Canella, Lea [Institut fuer Radiochemie, Technische Universitaet Muenchen, Walther-Meissner-Str. 3, 85748 Garching (Germany); Jolie, Jan; Kudejova, Petra; Warr, Nigel [Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Str. 77, 50937 Cologne (Germany)

    2009-01-28

    The observation of neutrinoless double beta decay would be proof of the Majorana nature of the neutrino. Half-lives for these decays are very long (for {sup 76}Ge:>10{sup 25} y), so background reduction and rejection is the major task for double beta experiments. The GERDA (GERmanium Detector Array) experiment at the Gran Sasso Laboratory of the INFN (LNGS) searches for neutrinoless double beta decay of {sup 76}Ge. The isotope {sup 76}Ge is an ideal candidate because it can be used as source and detector at the same time. A large remaining contribution to the background arises from the prompt gamma cascade after neutron capture by {sup 76}Ge followed by {beta}{sup -}-decay of {sup 77}Ge. Since the prompt gamma decay scheme is poorly known, measurements with isotopically enriched Germanium samples were carried out at the PGAA facility at the research reactor FRM II (Munich). With the known prompt gamma spectrum it will be possible to improve the overall veto efficiency of the GERDA experiment.

  9. A measurement of the 2 neutrino double beta decay rate of Te-130 in the CUORICINO experiment

    SciTech Connect (OSTI)

    Kogler, Laura

    2011-11-03

    CUORICINO was a cryogenic bolometer experiment designed to search for neutrinoless double beta decay and other rare processes, including double beta decay with two neutrinos (2{nu}{beta}{beta}). The experiment was located at Laboratori Nazionali del Gran Sasso and ran for a period of about 5 years, from 2003 to 2008. The detector consisted of an array of 62 TeO{sub 2} crystals arranged in a tower and operated at a temperature of #24;10 mK. Events depositing energy in the detectors, such as radioactive decays or impinging particles, produced thermal pulses in the crystals which were read out using sensitive thermistors. The experiment included 4 enriched crystals, 2 enriched with {sup 130}Te and 2 with {sup 128}Te, in order to aid in the measurement of the 2{nu}{beta}{beta} rate. The enriched crystals contained a total of #24;350 g {sup 130}Te. The 128-enriched (130-depleted) crystals were used as background monitors, so that the shared backgrounds could be subtracted from the energy spectrum of the 130- enriched crystals. Residual backgrounds in the subtracted spectrum were fit using spectra generated by Monte-Carlo simulations of natural radioactive contaminants located in and on the crystals. The 2{nu}{beta}{beta} half-life was measured to be T{sup 2{nu}}{sub 1/2} = [9.81{+-} #6;0.96(stat){+-} 0.49(syst)]#2;x10{sup 20} y.

  10. A new, very massive modular Liquid Argon Imaging Chamber to detect low energy off-axis neutrinos from the CNGS beam. (Project MODULAr)

    E-Print Network [OSTI]

    Baibussinov, B; Battistoni, G; Benetti, P; Borio, A; Calligarich, E; Cambiaghi, M; Cavanna, F; Centro, Sandro; Cocco, A G; Dolfini, R; Berzolari, A Gigli; Farnese, C; Fava, A; Ferrari, A; Fiorillo, G; Gibin, D; Guglielmi, A M; Mannocchi, G; Mauri, F; Menegolli, A; Meng, G; Montanari, C; Palamara, O; Periale, L; Piazzoli, A; Picchi, P; Pietropaolo, F; Rappoldi, A; Raselli, G L; Rubbia, Carlo; Sala, P; Satta, G; Varanini, F; Ventura, Sandro; Vignoli, C

    2007-01-01

    The paper is considering an opportunity for the CERN/GranSasso (CNGS) neutrino complex, concurrent time-wise with T2K and NOvA, to search for theta_13 oscillations and CP violation. Compared with large water Cherenkov (T2K) and fine grained scintillators (NOvA), the LAr-TPC offers a higher detection efficiency and a lower backgrounds, since virtually all channels may be unambiguously recognized. The present proposal, called MODULAr, describes a 20 kt fiducial volume LAr-TPC, following very closely the technology developed for the ICARUS-T60o, and is focused on the following activities, for which we seek an extended international collaboration: (1) the neutrino beam from the CERN 400 GeV proton beam and an optimised horn focussing, eventually with an increased intensity in the framework of the LHC accelerator improvement program; (2) A new experimental area LNGS-B, of at least 50000 m3 at 10 km off-axis from the main Laboratory, eventually upgradable to larger sizes. A location is under consideration at about ...

  11. NAHUAL: A cool spectrograph for planets of ultra-cool objects

    E-Print Network [OSTI]

    E. W. Guenther; E. L. Martin; D. Barrado y Navascues; U. Laux

    2005-09-14

    We present the status of an ongoing study to built a a high resolution near infrared Echelle spectrograph (NAHUAL) for the 10.4-m-Gran Telescopio Canarias (GTC) which will be especially optimised for planet searches by means of high precision radial velocity measurements. We show that infrared radial velocity programs are particularly suitable to search for planets very low mass stars and brown dwarfs, as well as active stars. The goal of NAHUAL is to reach an accuracy of the radial velocity measurement of a few m/s, which would allow the detection of planets with a few earth-masses orbiting low-mass stars and brown dwarfs. It is planed that NAHUAL covers simultaneously the full wavelength range in the J, H, and K-band, and will also serve as a general purpose high resolution near infrared spectrograph of the GTC. The planed instrument will have a resolution of R=50,000 with a 0.175 arcsec slit, and an AO-system. An absorption cell will serve as a simultaneous wavelength reference.

  12. A search for lithium in metal-poor L dwarfs

    E-Print Network [OSTI]

    Lodieu, N; Pavlenko, Y; Rebolo, R

    2015-01-01

    The aim of the project is to search for lithium in absorption at 6707.8 Angstroms to constrain the nature and the mass of the brightest low-metallicity L-type dwarfs (refered to as L subdwarfs) identified in large-scale surveys. We obtained low- to intermediate-resolution (R~2500-9000) optical (~560-770 nm) spectra of two mid-L subdwarfs, SDSSJ125637.13-022452.4 (SDSS1256; sdL3.5) and 2MASSJ162620.14+392519.5 (2MASS1626; sdL4) with spectrographs on the European Southern Observatory Very Large Telescope and the Gran Telescopio de Canarias. We report the presence of a feature at the nominal position of the lithium absorption doublet at 6707.8 Angstroms in the spectrum of SDSS1256, with an equivalent width of 66+/-27 Angstroms at 2.4 sigma, which we identify as arising from a CaH molecular transition based on atmosphere models. We do not see any feature at the position of the lithium feature in the spectrum of 2MASS1626. The existence of overlapping molecular absorption sets a confusion detection limit of [Li/H]...

  13. THE DUST ENVIRONMENT OF MAIN-BELT COMET P/2012 T1 (PANSTARRS)

    SciTech Connect (OSTI)

    Moreno, F.; Pozuelos, F. [Instituto de Astrofisica de Andalucia, CSIC, Glorieta de la Astronomia s/n, E-18008 Granada (Spain); Cabrera-Lavers, A.; Vaduvescu, O.; Licandro, J., E-mail: fernando@iaa.es [Instituto de Astrofisica de Canarias, c/Via Lactea s/n, E-38200 La Laguna, Tenerife (Spain)

    2013-06-20

    The Main-Belt Comet P/2012 T1 (PANSTARRS) has been imaged using the 10.4 m Gran Telescopio Canarias and the 4.2 m William Herschel Telescope at six epochs in the period from 2012 November to 2013 February, with the aim of monitoring its dust environment. The dust tails' brightness and morphology are best interpreted in terms of a model of sustained dust emission spanning four to six months. The total dust mass ejected is estimated at {approx}6-25 Multiplication-Sign 10{sup 6} kg. We assume a time-independent power-law size distribution function, with particles in the micrometer to centimeter size range. Based on the quality of the fits to the isophote fields, an anisotropic emission pattern is favored against an isotropic one, in which the particle ejection is concentrated toward high latitudes ({+-}45 Degree-Sign to {+-}90 Degree-Sign ) in a high-obliquity object (I = 80 Degree-Sign ). This seasonally driven ejection behavior, along with the modeled particle ejection velocities, are in remarkable agreement to those we found for P/2010 R2 (La Sagra).

  14. The primary cosmic ray composition between 10**15 and 10**16 eV from Extensive Air Showers electromagnetic and TeV muon data

    E-Print Network [OSTI]

    Aglietta, M; Antonioli, P; Arneodo, F; Bergamasco, L; Bertaina, M; Castagnoli, C; Castellina, A; Chiavassa, A; Cini, G; D'Ettorre-Piazzoli, B; Di Sciascio, G; Fulgione, W; Galeotti, P; Ghia, P L; Iacovacci, M; Mannocchi, G; Morello, C; Navarra, G; Saavedra, O; Stamerra, A; Trinchero, G C; Valchierotti, S; Vallania, P; Vernetto, S; Vigorito, C; Ambrosio, M; Antolini, R; Baldini, A; Barbarino, G C; Barish, B C; Battistoni, G; Bellotti, R; Bemporad, C; Bernardini, P; Bilokon, H; Bloise, C; Bower, C; Brigida, M; Cafagna, F; Campana, D; Carboni, M; Cecchini, S; Cei, F; Choudhary, B C; Coutu, S; De Cataldo, G; Dekhissi, H; De Marzo, C; De Mitri, I; De Vincenzi, M; Di Credico, A; Forti, C; Fusco, P; Giacomelli, G; Giannini, G; Giglietto, N; Giorgini, M; Grassi, M; Grillo, A; Gustavino, C; Habig, A; Hanson, K; Heinz, R; Iarocci, E; Katsavounidis, E; Katsavounidis, I; Kearns, E; Kim, H; Kyriazopoulou, S; Lamanna, E; Lane, C; Levin, D S; Lipari, P; Longo, M J; Loparco, F; Maaroufi, F; Mancarella, G; Mandrioli, G; Margiotta, A; Marini, A; Martello, D; Marzari-Chiesa, A; Mazziotta, M N; Michael, D G; Monacelli, P; Montaruli, T; Monteno, M; Mufson, S L; Musser, J; Nicolò, D; Nolty, R; Orth, C; Osteria, G; Palamara, O; Patera, V; Patrizii, L; Pazzi, R; Peck, C W; Perrone, L; Petrera, S; Popa, V; Rainó, A; Reynoldson, J; Ronga, F; Satriano, C; Scapparone, E; Scholberg, K; Sciubba, A; Sioli, M; Sitta, M; Spinelli, P; Spinetti, M; Spurio, M; Steinberg, R; Stone, J L; Sulak, L R; Surdo, A; Tarle, G; Togo, V; Vakili, M; Walter, C W; Webb, R

    2004-01-01

    The cosmic ray primary composition in the energy range between 10**15 and 10**16 eV, i.e., around the "knee" of the primary spectrum, has been studied through the combined measurements of the EAS-TOP air shower array (2005 m a.s.l., 10**5 m**2 collecting area) and the MACRO underground detector (963 m a.s.l., 3100 m w.e. of minimum rock overburden, 920 m**2 effective area) at the National Gran Sasso Laboratories. The used observables are the air shower size (Ne) measured by EAS-TOP and the muon number (Nmu) recorded by MACRO. The two detectors are separated on average by 1200 m of rock, and located at a respective zenith angle of about 30 degrees. The energy threshold at the surface for muons reaching the MACRO depth is approximately 1.3 TeV. Such muons are produced in the early stages of the shower development and in a kinematic region quite different from the one relevant for the usual Nmu-Ne studies. The measurement leads to a primary composition becoming heavier at the knee of the primary spectrum, the kn...

  15. Determination of free acid by standard addition method in potassium thiocyanate

    SciTech Connect (OSTI)

    Baumann, E W

    1982-06-01

    The free acid content of solutions containing hydrolyzable ions has been determined potentiometrically by a standard addition method. Two increments of acid are added to the sample in 1M potassium thiocyanate solution. The sample concentration is calculated by solution of three simultaneous Nernst equations. The method has been demonstrated for solutions containing Al/sup 3 +/, Cr/sup 3 +/, Fe/sup 3 +/, Hg/sup 2 +/, Ni/sup 2 +/, Th/sup 4 +/, or UO/sub 2//sup 2 +/ with a metal-to-acid ratio of < 2.5. The method is suitable for determination of 10 ..mu..moles acid in 10 mL total volume. The accuracy can be judged from the agreement of the Nernst slopes found in the presence and absence of hydrolyzable ions. The relative standard deviation is < 2.5%. The report includes a survey of experiments with thermometric, pH, and Gran plot titrations in a variety of complexants, from which the method was evolved. Also included is a literature survey of sixty references, a discussion of the basic measurements, and a complete analytical procedure.

  16. Agujeros de Gusano en Gravedad (2+1)

    E-Print Network [OSTI]

    Alexis Larranaga

    2007-07-16

    Traversable wormholes are objects that present a lot of interest in the last years because of their geometric features and their relation with exotic matter. In this paper we presnt a review of the principal characteristics of traversable Morris-Thorne wormholes, their construction proccess and some aspects about the exotic matter that is needed in order to mantain them. Then, we use a junction proccess to obatin two specific wormhole solutions in the (2+1) gravity formalism with negative cosmological constant. The obtained solutions represent wormholes with an external spacetime correspondient to the BTZ black hole solution. We also show that exotic matter is needed to mantain these wormholes. ----- Los agujeros de gusano atravesables son objetos que presentan un gran interes en la actualidad debido a sus caracteristicas geometricas y a su relacion con la materia exotica. En el presente trabajo se muestra una revision de las caracteristicas de los agujeros de gusano atravesables al estilo de Morris y Thorne, al igual que el proceso de construccion y aspectos de la materia exotica necesaria para mantenerlos. Luego, se utiliza un proceso de juntura para construir dos soluciones especificas tipo agujero de gusano en el formalismo de la gravedad (2+1) con constante cosmologica negativa. Con esta construccion, se obtienen agujeros atravesables que se encuentran unidos a un espacio-tiempo externo correspondiente al agujero negro BTZ sin momento angular y sin carga electrica. Ademas de esto, se muestra que para mantener este tipo de solucion es necesaria la existencia de materia exotica, es decir, materia que viole las condiciones de energia.

  17. The second-phase development of the China JinPing underground laboratory

    SciTech Connect (OSTI)

    Li, Jianmin [Tsinghua University, Beijing (China); Ji, Xiangdong [University of Maryland, College Park, MD (United States); Shanghai Jiao Tong University, Shanghai (China); Haxton, Wick [University of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Wang, Joseph S.Y. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2015-01-01

    During 2013-2015 an expansion of the China JinPing underground Laboratory (CJPL) will be undertaken along a main branch of a bypass tunnel in the JinPing tunnel complex. This second phase of CJPL will increase laboratory space to approximately 96,000 m³, which can be compared to the existing CJPL-I volume of ~ 4,000 m³. One design configuration has eight additional hall spaces, each over 60 m long and approximately 12 m in width, with overburdens of about 2.4 km of rock, oriented parallel to and away from the main water transport and auto traffic tunnels. There are additional possibilities for further expansions at a nearby second bypass tunnel and along the entrance and exit branches of both bypass tunnels, potentially leading to an expanded CJPL comparable in size to Gran Sasso. Concurrent with the excavation activities, planning is underway for dark matter and other rare-event detectors, as well as for geophysics/engineering and other coupled multi-disciplinary sensors. In the town meeting on 8 September, 2013 at Asilomar, CA, associated with the 13th International Conference on Topics in Astroparticle and Underground Physics (TAUP), presentations and panel discussions addressed plans for one-ton expansions of the current CJPL germanium detector array of the China Darkmatter EXperiment (CDEX) collaboration and of the duel-phase xenon detector of the Panda-X collaboration, as well as possible new detector initiatives for dark matter studies, low-energy solar neutrino detection, neutrinoless double beta searches, and geoneutrinos. JinPing was also discussed as a site for a low-energy nuclear astrophysics accelerator. Geophysics/engineering opportunities include acoustic and micro-seismic monitoring of rock bursts during and after excavation, coupled-process in situ measurements, local, regional, and global monitoring of seismically induced radon emission, and electromagnetic signals. Additional ideas and projects will likely be developed in the next few years, driven by China’s domestic needs and by international experiments requiring access to very great depths.

  18. Neutron Interactions in the CUORE Neutrinoless Double Beta Decay Experiment

    SciTech Connect (OSTI)

    Dolinski, M J

    2008-09-24

    Neutrinoless double beta decay (0{nu}DBD) is a lepton-number violating process that can occur only for a massive Majorana neutrino. The search for 0{nu}DBD is currently the only practical experimental way to determine whether neutrinos are identical to their own antiparticles (Majorana neutrinos) or have distinct particle and anti-particle states (Dirac neutrinos). In addition, the observation of 0{nu}DBD can provide information about the absolute mass scale of the neutrino. The Cuoricino experiment was a sensitive search for 0{nu}DBD, as well as a proof of principle for the next generation experiment, CUORE. CUORE will search for 0{nu}DBD of {sup 130}Te with a ton-scale array of unenriched TeO{sub 2} bolometers. By increasing mass and decreasing the background for 0{nu}DBD, the half-life sensitivity of CUORE will be a factor of twenty better than that of Cuoricino. The site for both of these experiments is the Laboratori Nazionali del Gran Sasso, an underground laboratory with 3300 meters water equivalent rock overburden and a cosmic ray muon attenuation factor of 10{sup -6}. Because of the extreme low background requirements for CUORE, it is important that all potential sources of background in the 0{nu}DBD peak region at 2530 keV are well understood. One potential source of background for CUORE comes from neutrons, which can be produced underground both by ({alpha},n) reactions and by fast cosmic ray muon interactions. Preliminary simulations by the CUORE collaboration indicate that these backgrounds will be negligible for CUORE. However, in order to accurately simulate the expected neutron background, it is important to understand the cross sections for neutron interactions with detector materials. In order to help refine these simulations, I have measured the gamma-ray production cross sections for interactions of neutrons on the abundant stable isotopes of Te using the GEANIE detector array at the Los Alamos Neutron Science Center. In addition, I have used the GEANIE data to set an upper limit for the production of a 2529 keV gamma-ray from the {sup 126}Te(n,n{prime}{gamma}) reaction. This gamma-ray is a potential source of interference for the 0{nu}DBD peak. Based on this measurement, the contribution of this line to the background is expected to be negligible.

  19. The second-phase development of the China JinPing underground laboratory

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Li, Jianmin; Ji, Xiangdong; Haxton, Wick; Wang, Joseph S.Y.

    2015-03-24

    During 2013-2015 an expansion of the China JinPing underground Laboratory (CJPL) will be undertaken along a main branch of a bypass tunnel in the JinPing tunnel complex. This second phase of CJPL will increase laboratory space to approximately 96,000 m³, which can be compared to the existing CJPL-I volume of ~ 4,000 m³. One design configuration has eight additional hall spaces, each over 60 m long and approximately 12 m in width, with overburdens of about 2.4 km of rock, oriented parallel to and away from the main water transport and auto traffic tunnels. There are additional possibilities for furthermore »expansions at a nearby second bypass tunnel and along the entrance and exit branches of both bypass tunnels, potentially leading to an expanded CJPL comparable in size to Gran Sasso. Concurrent with the excavation activities, planning is underway for dark matter and other rare-event detectors, as well as for geophysics/engineering and other coupled multi-disciplinary sensors. In the town meeting on 8 September, 2013 at Asilomar, CA, associated with the 13th International Conference on Topics in Astroparticle and Underground Physics (TAUP), presentations and panel discussions addressed plans for one-ton expansions of the current CJPL germanium detector array of the China Darkmatter EXperiment (CDEX) collaboration and of the duel-phase xenon detector of the Panda-X collaboration, as well as possible new detector initiatives for dark matter studies, low-energy solar neutrino detection, neutrinoless double beta searches, and geoneutrinos. JinPing was also discussed as a site for a low-energy nuclear astrophysics accelerator. Geophysics/engineering opportunities include acoustic and micro-seismic monitoring of rock bursts during and after excavation, coupled-process in situ measurements, local, regional, and global monitoring of seismically induced radon emission, and electromagnetic signals. Additional ideas and projects will likely be developed in the next few years, driven by China’s domestic needs and by international experiments requiring access to very great depths.« less

  20. Petit-exposure at neutrino beamline (PEANUT)

    SciTech Connect (OSTI)

    Niwa, K.; /Nagoya U.

    2005-08-01

    The advantages of using nuclear emulsion as a particle detector are well known. The high resolution of emulsion has made it a medium of choice for a number of applications where the required spatial and angular resolution are paramount and its limitations due to the lack of timing information are less important. Emulsions are commonly used as cosmic ray detectors and have found applications in high energy experiments for detecting short lived particles such as charm, beauty and tau. The addition of electronic detectors to emulsion experiments solved the problem of the lack of timing information in the emulsion, but it was the development of automatic scanning machines that revolutionized the use of these hybrid detectors, making them capable of performing even in high rate environments. Most recently, The DONuT experiment (FNAL-E872), used a hybrid emulsion spectrometer to make the first direct observation of tau neutrino interactions [1]. The CNGS facility is being constructed to deliver a {nu}{sub {mu}} beam from the CERN SPS to the Gran Sasso Laboratory. Since it is believed that {nu}{sub {mu}} {leftrightarrow} {nu}{sub {tau}} oscillations explain the observed atmospheric {nu}{sub {mu}} deficit, the CNGS beam, coupled with a detector capable of observing {tau} appearance is an important experiment in the context of the world wide effort to determine the neutrino mass mixing matrix. The OPERA detector has been optimized to detect a significant sample of {nu}{sub {tau}} interactions by the subsequent observation of {tau} production and decay [2]. The OPERA target is a massive emulsion detector made in a sandwich structure of lead plates and layers of nuclear emulsion. For historical reasons this arrangement has been called an Emulsion Cloud Chamber or ECC. The ECC concept, which has many advantages over the use of bulk emulsion, has been used in the DONuT experiment. The ECC detector is capable of measuring all of the tracks, not due to nuclear fragments, coming from the primary neutrino interaction vertex, with their three dimensional slopes and momenta. It is also capable of electron identification with good e/{gamma} separation, due to its very fine segmentation. The OPERA ECC target modules are constructed as bricks of dimensions 12.5 x 10.0 x 7.5 cm{sup 3} in horizontal, vertical and along the beam axis. Each brick consists of series of 56 (1 mm thick) plates of passive material (lead or iron) alternated with emulsion films (43 {micro}m emulsion layer on both sides of a transparent 200 {micro}m thick plastic film). In preparation for OPERA we would like to expose the OPERA target modules to a beam of neutrinos. This will allow us to test many of our analysis procedures and techniques as well as to validate the simulation of neutrino interactions, both for the production of forward and backward particles. Although the HE (high energy) beam of NuMI would be a better match to the CNGS energy, data acquired with NuMI LE (low energy) beam would serve the same purpose, albeit more challenging. Given the high interaction rate from the NuMI beam, the test detector target mass can be kept low and additional detectors can easily be built around a small target. These measurements are not possible in the CNGS beam, since it has no short baseline hall.