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Title: Selected spectroscopic results on element 115 decay chains

Abstract

We observed thirty correlated α-decay chains in an experiment studying the fusion-evaporation reaction 48Ca + 243Am at the GSI Helmholtzzentrum fur Schwerionenforschung. The decay characteristics of the majority of these 30 chains are consistent with previous observations and interpretations of such chains to originate from isotopes of element Z = 115. High-resolution α-photon coincidence spectroscopy in conjunction with comprehensive Monte-Carlo simulations allow to propose excitation schemes of atomic nuclei of the heaviest elements, thereby probing nuclear structure models near the 'Island of Stability' with unprecedented experimental precision.

Authors:
 [1];  [1];  [1];  [1];  [2];  [3]; ;  [4]; ; ; ; ;  [4];  [3]; ; ;  [2];  [1];  [2];  [2] more »;  [2];  [1]; ;  [3];  [3];  [3];  [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2]; ;  [3]; ; ; ;  [1];  [2];  [2];  [2];  [3];  [2]; ; ; ; ;  [1];  [3] « less
+ Show Author Affiliations
  1. Lund Univ. (Sweden)
  2. GSI-Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
  3. Helmholtz Inst. of Mainz, Mainz (Germany)
  4. GSI-Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany); Helmholtz Inst. of Mainz, Mainz (Germany)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; Royal Physiographic Society in Lund; UK Science and Technology Facilities Council; Swedish Research Council (SRC); German Federal Ministry of Education and Research (BMBF); Office of Nuclear Physics
OSTI Identifier:
1261407
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 303; Journal Issue: 2; Journal ID: ISSN 0236-5731
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Superheavy elements; Nuclear spectroscopy; Nuclear structure

Citation Formats

Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L. G., Yakushev, A., Andersson, L. -L., Di Nitto, A., Düllmann, Ch. E., Gates, J. M., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Åberg, S., Ackermann, D., Block, M., Brand, H., Carlsson, B. G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. E., and Wiehl, N. Selected spectroscopic results on element 115 decay chains. United States: N. p., 2014. Web. doi:10.1007/s10967-014-3445-y.
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Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L. G., Yakushev, A., Andersson, L. -L., Di Nitto, A., Düllmann, Ch. E., Gates, J. M., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Åberg, S., Ackermann, D., Block, M., Brand, H., Carlsson, B. G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. E., & Wiehl, N. Selected spectroscopic results on element 115 decay chains. United States. https://doi.org/10.1007/s10967-014-3445-y
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Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L. G., Yakushev, A., Andersson, L. -L., Di Nitto, A., Düllmann, Ch. E., Gates, J. M., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Åberg, S., Ackermann, D., Block, M., Brand, H., Carlsson, B. G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. E., and Wiehl, N. 2014. "Selected spectroscopic results on element 115 decay chains". United States. https://doi.org/10.1007/s10967-014-3445-y. https://www.osti.gov/servlets/purl/1261407.
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@article{osti_1261407,
title = {Selected spectroscopic results on element 115 decay chains},
author = {Rudolph, D. and Forsberg, U. and Golubev, P. and Sarmiento, L. G. and Yakushev, A. and Andersson, L. -L. and Di Nitto, A. and Düllmann, Ch. E. and Gates, J. M. and Gregorich, K. E. and Gross, C. J. and Herzberg, R. -D. and Heßberger, F. P. and Khuyagbaatar, J. and Kratz, J. V. and Rykaczewski, K. and Schädel, M. and Åberg, S. and Ackermann, D. and Block, M. and Brand, H. and Carlsson, B. G. and Cox, D. and Derkx, X. and Eberhardt, K. and Even, J. and Fahlander, C. and Gerl, J. and Jäger, E. and Kindler, B. and Krier, J. and Kojouharov, I. and Kurz, N. and Lommel, B. and Mistry, A. and Mokry, C. and Nitsche, H. and Omtvedt, J. P. and Papadakis, P. and Ragnarsson, I. and Runke, J. and Schaffner, H. and Schausten, B. and Thörle-Pospiech, P. and Torres, T. and Traut, T. and Trautmann, N. and Türler, A. and Ward, A. and Ward, D. E. and Wiehl, N.},
abstractNote = {We observed thirty correlated α-decay chains in an experiment studying the fusion-evaporation reaction 48Ca + 243Am at the GSI Helmholtzzentrum fur Schwerionenforschung. The decay characteristics of the majority of these 30 chains are consistent with previous observations and interpretations of such chains to originate from isotopes of element Z = 115. High-resolution α-photon coincidence spectroscopy in conjunction with comprehensive Monte-Carlo simulations allow to propose excitation schemes of atomic nuclei of the heaviest elements, thereby probing nuclear structure models near the 'Island of Stability' with unprecedented experimental precision.},
doi = {10.1007/s10967-014-3445-y},
url = {https://www.osti.gov/biblio/1261407}, journal = {Journal of Radioanalytical and Nuclear Chemistry},
issn = {0236-5731},
number = 2,
volume = 303,
place = {United States},
year = {Sun Aug 24 00:00:00 EDT 2014},
month = {Sun Aug 24 00:00:00 EDT 2014}
}
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https://doi.org/10.1007/s10967-014-3445-y
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Works referenced in this record:

Synthesis of the heaviest elements in 48 Ca-induced reactions
journal, July 2011

A Hartree–Fock Nuclear mass Table
journal, March 2001

Shell stabilization of super- and hyperheavy nuclei without magic gaps
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Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains
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Discovery of the elements with atomic numbers greater than or equal to 113 (IUPAC Technical Report)
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α -decay chains of 115 173 288 and 1 172 287 15 in the relativistic mean field theory
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TASISpec—A highly efficient multi-coincidence spectrometer for nuclear structure investigations of the heaviest nuclei
journal, October 2010

  • Andersson, L. -L.; Rudolph, D.; Golubev, P.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 622, Issue 1
  • https://doi.org/10.1016/j.nima.2010.06.243

Study of the average charge states of 188Pb and 252,254No ions at the gas-filled separator TASCA
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  • Khuyagbaatar, J.; Ackermann, D.; Andersson, L. -L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 689
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Influence of energy summing of α-particles and conversion electrons on the shapes of α-spectra in the region of the heaviest nuclei
journal, January 1989

  • Hessberger, F. P.; Hofmann, S.; Münzenberg, G.
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Self-consistent calculations of alpha-decay energies
journal, June 2013

XCIII. The high-frequency spectra of the elements
journal, December 1913

The reaction 48Ca + 248Cm → 296116* studied at the GSI-SHIP
journal, May 2012

In-beam and decay spectroscopy of transfermium nuclei
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Nuclear Ground-State Masses and Deformations
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G.; Andersson, L. -L.; Rudolph, D.</span> </li> <li> Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 667</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1016/j.nima.2011.11.074" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1016/j.nima.2011.11.074<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevLett.31.647" target="_blank" rel="noopener noreferrer" class="name">X-Ray Identification of Element 104<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1973-09-01">September 1973</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Bemis, C. E.; Silva, R. J.; Hensley, D. C.</span> </li> <li> Physical Review Letters, Vol. 31, Issue 10</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1103/PhysRevLett.31.647" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1103/PhysRevLett.31.647<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/0375-9474(69)90147-X" target="_blank" rel="noopener noreferrer" class="name">Calculation of K, L, M and N binding energies and K X-rays for elements from Z = 96–120<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1969-09-01">September 1969</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Carlson, Thomas A.; Nestor, C. W.; Malik, F. B.</span> </li> <li> Nuclear Physics A, Vol. 135, Issue 1</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1016/0375-9474(69)90147-X" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1016/0375-9474(69)90147-X<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/0375-9474(69)90809-4" target="_blank" rel="noopener noreferrer" class="name">On the nuclear structure and stability of heavy and superheavy elements<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1969-06-01">June 1969</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Nilsson, Sven Gösta; Tsang, Chin Fu; Sobiczewski, Adam</span> </li> <li> Nuclear Physics A, Vol. 131, Issue 1</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1016/0375-9474(69)90809-4" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1016/0375-9474(69)90809-4<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1140/epja/i2007-10373-x" target="_blank" rel="noopener noreferrer" class="name">The reaction 48Ca + 238U → 286112* studied at the GSI-SHIP<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2007-06-01">June 2007</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Hofmann, S.; Ackermann, D.; Antalic, S.</span> </li> <li> The European Physical Journal A, Vol. 32, Issue 3</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1140/epja/i2007-10373-x" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1140/epja/i2007-10373-x<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevLett.104.252701" target="_blank" rel="noopener noreferrer" class="name">Production and Decay of Element 114: High Cross Sections and the New Nucleus <math display="inline"> <mmultiscripts> <mi>Hs</mi> <mprescripts/> <none/> <mn>277</mn> </mmultiscripts> </math><span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2010-06-01">June 2010</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Düllmann, Ch. E.; Schädel, M.; Yakushev, A.</span> </li> <li> Physical Review Letters, Vol. 104, Issue 25</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1103/PhysRevLett.104.252701" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1103/PhysRevLett.104.252701<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevLett.111.112502" target="_blank" rel="noopener noreferrer" class="name">Spectroscopy of Element 115 Decay Chains<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2013-09-01">September 2013</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Rudolph, D.; Forsberg, U.; Golubev, P.</span> </li> <li> Physical Review Letters, Vol. 111, Issue 11</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1103/PhysRevLett.111.112502" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1103/PhysRevLett.111.112502<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevC.69.029902" target="_blank" rel="noopener noreferrer" class="name">Publisher’s Note: Experiments on the synthesis of element 115 in the reaction <math display="inline"> <mrow> <mmultiscripts> <mi mathvariant="normal">Am</mi> <mprescripts/> <none/> <mrow> <mn>243</mn> </mrow> </mmultiscripts> <mrow> <mo>(</mo> <mrow> <mmultiscripts> <mi mathvariant="normal">Ca</mi> <mprescripts/> <none/> <mrow> <mn>48</mn> </mrow> </mmultiscripts> <mo>,</mo> <mi>x</mi> <mi>n</mi> </mrow> <mo>)</mo> </mrow> <mmultiscripts> <mn>115</mn> <mprescripts/> <none/> <mrow> <mn>291</mn> <mo>−</mo> <mi>x</mi> </mrow> </mmultiscripts> </mrow> </math> [Phys. Rev. C <strong>69</strong> , 021601(R) (2004)]<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2004-02-01">February 2004</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Oganessian, Yu. Ts.; Utyonkov, V. K.; Lobanov, Yu. V.</span> </li> <li> Physical Review C, Vol. 69, Issue 2</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1103/PhysRevC.69.029902" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1103/PhysRevC.69.029902<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevC.87.014302" target="_blank" rel="noopener noreferrer" class="name">Investigation of the <math display="inline"> <msup> <mrow/> <mn>243</mn> </msup> <mi>Am</mi> <mo>+</mo> <msup> <mrow/> <mn>48</mn> </msup> <mi>Ca</mi> </math> reaction products previously observed in the experiments on elements 113, 115, and 117<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2013-01-01">January 2013</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Oganessian, Yu. Ts.; Abdullin, F. Sh.; Dmitriev, S. N.</span> </li> <li> Physical Review C, Vol. 87, Issue 1</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1103/PhysRevC.87.014302" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1103/PhysRevC.87.014302<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1051/epjconf/20146602036" target="_blank" rel="noopener noreferrer" class="name">Spectroscopic Tools Applied to Element Z = 115 Decay Chains<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2014-01-01">January 2014</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Forsberg, U.; Rudolph, D.; Golubev, P.</span> </li> <li> EPJ Web of Conferences, Vol. 66</li> <li> <span class="text-muted related-url"><a href="https://doi.org/10.1051/epjconf/20146602036" class="text-muted" target="_blank" rel="noopener noreferrer">https://doi.org/10.1051/epjconf/20146602036<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <div class="pagination-container small"> <a class="pure-button prev page" href="#" rel="prev"><span class="fa fa-angle-left"></span><span class="sr-only">Previous</span></a><ul class="pagination d-inline-block" style="padding-left:.2em;"></ul><a class="pure-button next page" href="#" rel="next"><span class="fa fa-angle-right"></span><span class="sr-only">Next</span></a> </div> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All References</a></li> <li class="small" style="margin-left:.75em; text-transform:capitalize;"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="journal"><span class="fa fa-angle-right"></span> journal<small class="text-muted"> (34)</small></a></li> </ul> <div style="margin-top:2em;"> <form class="pure-form small text-muted reference-search"> <label for="reference-search-text" class="sr-only">Search</label> <input class="search form-control pure-input-1" id="reference-search-text" placeholder="Search" style="margin-bottom:10px;" /> <fieldset> <legend class="sr-only">Sort options</legend> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="name" style="position:relative;top:2px;" id="reference-search-sort-name"><label for="reference-search-sort-name" style="margin-left: .3em;">Sort by title</label></div> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="date" data-order="desc" style="position:relative;top:2px;" id="reference-search-sort-date"><label for="reference-search-sort-date" style="margin-left: .3em;">Sort by date</label></div> </fieldset> <div class="text-left" style="margin-left:1em;"> <a href="" class="filter-clear clearfix" title="Clear filter / sort" style="font-weight:normal; float:none;">[ × clear filter / sort ]</a> </div> <button type="submit" style="display:none;" aria-hidden="true" title="Submit"/> </form> </div> </div> </div> </section> <section id="biblio-related" class="tab-content tab-content-sec " data-tab="biblio"> <div class="row"> <div class="col-sm-9 order-sm-9"> <section id="biblio-similar" class="tab-content tab-content-sec active" data-tab="related"> <div class="padding"> <p class="lead text-muted" style="font-size: 18px; margin-top:0px;">Similar records in OSTI.GOV collections:</p> <aside> <ul class="item-list" itemscope itemtype="http://schema.org/ItemList" style="padding-left:0; list-style-type: none;"> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="0" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/1407228" itemprop="url">Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Rudolph, D.</span>; <span class="author">Forsberg, U.</span>; <span class="author">Golubev, P.</span>; <span class="author">...</span> <span class="text-muted pubdata"> - Acta Physica Polonica. Series B</span> </span></div> <div class="abstract">Produced in the reaction <sup>48</sup>Ca+ <sup>243</sup>Am, thirty correlated α-decay chains were observed in an experiment conducted at the GSI Helmholzzentrum für Schwerionenforschung, Darmstadt, Germany. The decay chains are basically consistent with previous findings and are considered to originate from isotopes of element 115 with mass numbers 287, 288, and 289. A set-up aiming specifically for high-resolution charged particle and photon coincidence spectroscopy was placed behind the gas-filled separator TASCA. For the first time, γ rays as well as X-ray candidates were observed in prompt coincidence with the α-decay chains of element 115.</div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc doi-link " href="https://doi.org/10.5506/APhysPolB.45.263" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1407228" data-product-type="Conference" data-product-subtype="" >https://doi.org/10.5506/APhysPolB.45.263</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/servlets/purl/1407228" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1407228" data-product-type="Conference" data-product-subtype="" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="3" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/1761549" itemprop="url">Spectroscopy along Flerovium Decay Chains: Discovery of <math><mrow> <mmultiscripts> <mrow> <mi> Ds </mi> </mrow> <mprescripts/> <none/> <mrow> <mn> 280 </mn> </mrow> </mmultiscripts> </mrow> </math> and an Excited State in <math><mrow> <mmultiscripts> <mrow> <mi> Cn </mi> </mrow> <mprescripts/> <none/> <mrow> <mn> 282 </mn> </mrow> </mmultiscripts> </mrow> </math></a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Såmark-Roth, A.</span>; <span class="author">Cox, D.</span>; <span class="author">Rudolph, D.</span>; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review Letters</span> </span></div> <div class="abstract">A nuclear spectroscopy experiment was conducted to study α-decay chains stemming from isotopes of flerovium (element Z=114). An upgraded TASISpec decay station was placed behind the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany. The fusion-evaporation reactions <sup>48</sup>Ca + <sup>242</sup>Pu and <sup>48</sup>Ca + <sup>244</sup>Pu provided a total of 32 flerovium-candidate decay chains, of which two and eleven were firmly assigned to <sup>286</sup>Fl and <sup>288</sup>Fl, respectively. A prompt coincidence between a 9.60(1)-MeV α particle event and a 0.36(1)-MeV conversion electron marked the first observation of an excited state in an even-even isotope of the heaviest man-made elements,<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> namely <sup>282</sup>Cn. Spectroscopy of <sup>288</sup>Fl decay chains fixed Q<sub>α</sub> = 10.06(1) MeV. In one case, a Q<sub>α</sub> = 9.46(1)-MeV decay from <sup>284</sup>Cn into <sup>280</sup>Ds was observed, with <sup>280</sup>Ds fissioning after only 518 μs. The impact of these findings, aggregated with existing data on decay chains of <sup>286,288</sup>Fl, on the size of an anticipated shell gap at proton number Z = 114 is discussed in light of predictions from two beyond-mean-field calculations, which take into account triaxial deformation.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc doi-link " href="https://doi.org/10.1103/PhysRevLett.126.032503" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1761549" data-product-type="Journal Article" data-product-subtype="PA" >https://doi.org/10.1103/PhysRevLett.126.032503</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="4" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/1095153" itemprop="url">Spectroscopy of element 115 decay chains</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Rudolph, Dirk</span>; <span class="author">Forsberg, U.</span>; <span class="author">Golubev, P.</span>; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review Letters</span> </span></div> <div class="abstract">A high-resolution a, X-ray and -ray coincidence spectroscopy experiment was conducted at the GSI Helmholtzzentrum fu r Schwerionenforschung. Thirty correlated a-decay chains were detected following the fusion-evaporation reaction 48Ca + 243Am. The observations are consistent with previous assignments of similar decay chains to originate from element Z = 115. The data includes first candidates of fingerprinting the decay step Mt --> Bh with characteristic X rays. For the first time, precise spectroscopy allows the derivation of excitation schemes of isotopes along the decay chains starting with elements Z > 112. Comprehensive Monte-Carlo simulations accompany the data analysis. Nuclear structure models<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> provide a first level interpretation.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc doi-link " href="https://doi.org/10.1103/PhysRevLett.111.112502" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1095153" data-product-type="Journal Article" data-product-subtype="AC" >https://doi.org/10.1103/PhysRevLett.111.112502</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="6" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/1332816" itemprop="url">Recoil-α-fission and recoil-α–α-fission events observed in the reaction <sup>48</sup>Ca + <sup>243</sup>Am</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Forsberg, Ulrika</span>; <span class="author">Rudolph, D.</span>; <span class="author">Andersson, L.</span>; <span class="author">...</span> <span class="text-muted pubdata"> - Nuclear Physics. A</span> </span></div> <div class="abstract">Products of the fusion-evaporation reaction 48Ca + 243Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element , two recoil-α-fission and five recoil--fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel 289 115<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> due to the fact that these recoil--fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil--fission decay chains, as well as some of the recoil--fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel 288 115.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 44<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc doi-link " href="https://doi.org/10.1016/j.nuclphysa.2016.04.025" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1332816" data-product-type="Journal Article" data-product-subtype="AM" >https://doi.org/10.1016/j.nuclphysa.2016.04.025</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/servlets/purl/1332816" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1332816" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="7" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/1393336" itemprop="url">Decay spectroscopy of element 115 daughters: <math> <mrow> <mmultiscripts> <mi> Rg </mi><mprescripts/><none/> <mn> 280 </mn> </mmultiscripts> <mo> → </mo> <mmultiscripts> <mi> Mt </mi><mprescripts/><none/> <mn> 276 </mn> </mmultiscripts> </mrow> </math> and <math> <mrow> <mmultiscripts> <mi> Mt </mi><mprescripts/><none/> <mn> 276 </mn> </mmultiscripts> <mo> → </mo> <mmultiscripts> <mi> Bh </mi><mprescripts/><none/> <mn> 272 </mn> </mmultiscripts> </mrow> </math></a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Gates, J.</span>; <span class="author">Gregorich, K.</span>; <span class="author">Gothe, O.</span>; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review C, Nuclear Physics</span> </span></div> <div class="abstract">In this study, forty-six decay chains, assigned to the decay of <sup>288</sup>115, were produced using the <sup>243</sup>Am (<sup>48</sup>Ca, 3n) <sup>288</sup>115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be <sup>280</sup>Rg and <sup>276</sup>Mt, respectively). Upon combining these data with those from 22 <sup>288</sup>115 decay chains observed in a similar experiment, updated level schemes in <sup>276</sup>Mt and <sup>272</sup>Bh (populated by the α decay of <sup>280</sup>Rg and <sup>276</sup>Mt,<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> respectively) are proposed. Additionally, photons were observed in the energy range expected for K x rays coincident with the α decay of both <sup>280</sup>Rg and <sup>276</sup>Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 48<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc doi-link " href="https://doi.org/10.1103/PhysRevC.92.021301" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1393336" data-product-type="Journal Article" data-product-subtype="AM" >https://doi.org/10.1103/PhysRevC.92.021301</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/servlets/purl/1393336" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1393336" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> </ul> </aside> </div> </section> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a class="tab-nav disabled" data-tab="related" style="color: #636c72 !important; opacity: 1;"><span class="fa fa-angle-right"></span> Similar Records</a></li> </ul> </div> </div> </section> </div></div> </div> </div> </section> <footer class="" style="background-color:#f9f9f9; /* padding-top: 0.5rem; */"> <div class="footer-minor"> <div class="container"> <hr class="footer-separator" /> <div class="text-center" style="margin-top:1.25rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list" id="footer-org-menu"> <li class="pure-menu-item d-block d-inline-small"> <a href="https://energy.gov" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-us-doe-min" alt="U.S. Department of Energy" /> </a> </li> <li class="pure-menu-item d-block d-inline-small"> <a href="https://www.energy.gov/science/office-science" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-office-of-science-min" alt="Office of Science" /> </a> </li> <li class="pure-menu-item d-block d-inline-small"> <a href="/"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-osti-min" alt="Office of Scientific and Technical Information" /> </a> </li> </ul> </div> </div> <div class="text-center small" style="margin-top:0.5em;margin-bottom:2.0rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list"> <li class="pure-menu-item"><a href="/disclaim" class="pure-menu-link"><span class="fa fa-institution"></span> Website Policies <span class="d-none d-sm-inline" style="color:#737373;">/ Important Links</span></a></li> <li class="pure-menu-item"><a href="/contact" class="pure-menu-link"><span class="fa fa-comments-o"></span> Contact Us</a></li> <li class="d-block d-md-none mb-1"></li> <li class="pure-menu-item"><a href="https://doe.responsibledisclosure.com/hc/en-us" target="_blank" class="pure-menu-link">Vulnerability Disclosure Program</a></li> <li class="d-block d-lg-none mb-1"></li> <li class="pure-menu-item"><a href="https://www.facebook.com/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-facebook"></span><span class="sr-only">Facebook</span></a></li> <li class="pure-menu-item"><a href="https://twitter.com/OSTIgov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-twitter"></span><span class="sr-only">Twitter</span></a></li> <li class="pure-menu-item"><a href="https://www.youtube.com/user/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-youtube-play"></span><span class="sr-only">YouTube</span></a></li> </ul> </div> </div> </div> </div> </footer> <link href="/css/ostigov.fonts.240327.0425.css" rel="stylesheet"> <script src="/js/ostigov.240327.0425.js"></script><noscript></noscript> <script defer src="/js/ostigov.biblio.240327.0425.js"></script><noscript></noscript> <script async type="text/javascript" src="/js/Universal-Federated-Analytics-Min.js?agency=DOE" id="_fed_an_ua_tag"></script><noscript></noscript> </body> <!-- OSTI.GOV v.240327.0425 --> </html>