Experimental study of isomeric intruder 12+ states in At197,203

Auranen, K.; Uusitalo, J.; Juutinen, S.; Badran, H.; Bisso, F. Defranchi; Cox, D.; Grahn, T.; Greenlees, P. T.; Herzan, A.; Jakobsson, U.; Julin, R.; Konki, J.; Leino, M.; Lightfoot, A.; Mallaburn, M.; Neuvonen, O.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Rahkila, P.; Sandzelius, M.; Saren, J.; Scholey, C.; Sorri, J.; Stolze, S.

doi:10.1103/PhysRevC.95.044311

Title: Experimental study of isomeric intruder ${\frac{1}{2}}^{+}$ states in ${}^{197, 203}{At}$

Journal Article · Mon Apr 10 00:00:00 EDT 2017 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.95.044311· OSTI ID:1368565

Auranen, K. ^[1]; Uusitalo, J. ^[2]; Juutinen, S. ^[2]; Badran, H. ^[2]; Bisso, F. Defranchi ^[2]; Cox, D. ^[2]; Grahn, T. ^[2]; Greenlees, P. T. ^[2]; Herzan, A. ^[3]; Jakobsson, U. ^[4]; Julin, R. ^[2]; Konki, J. ^[2]; Leino, M. ^[2]; Lightfoot, A. ^[2]; Mallaburn, M. ^[5]; Neuvonen, O. ^[2]; Pakarinen, J. ^[2]; Papadakis, P. ^[2]; Partanen, J. ^[2]; Rahkila, P. ^[2] more »

Univ. of Jyvaskyla (Finland); Argonne National Lab. (ANL), Lemont, IL (United States)
Univ. of Jyvaskyla (Finland)
Univ. of Jyvaskyla (Finland); Univ. of Liverpool, Liverpool (United Kingdom)
Royal Institute of Technology, Stockholm (Sweden); Univ. of Helsinki (Finland)
The Univ. of Manchester, Manchester (United Kingdom)

A newly observed isomeric intruder ½⁺ state [T_½=3.5(6)ms] is identified in ²⁰³At using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of E3 and mixed M1/E2 transitions to the 9/2^– ground state, and it is suggested to originate from the π(s_½)^–1 configuration. In addition, the structures above the ½⁺ state in ²⁰³At and ¹⁹⁷At are studied using in-beam γ-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. As a result, the ½⁺ state is fed from 3/2⁺ and 5/2⁺ states, and the origin of these states are discussed.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: European Commission, Community Research and Development Information Service (CORDIS), Seventh Framework Programme (FP7); Academy of Finland, Centre of Excellence; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1368565

Alternate ID(s):: OSTI ID: 1351042

Journal Information:: Physical Review C, Vol. 95, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 6 works

Citation information provided by
Web of Science

References (52)

Prompt and delayed spectroscopy of ${}^{199}{At}$ Jakobsson, U.; Uusitalo, J.; Juutinen, S. Physical Review C, Vol. 82, Issue 4 https://doi.org/10.1103/PhysRevC.82.044302	journal	October 2010
Low-lying states of valence-hole nuclei in the ²⁰⁸ Pb region Jiang, H.; Shen, J. J.; Zhao, Y. M. Journal of Physics G: Nuclear and Particle Physics, Vol. 38, Issue 4 https://doi.org/10.1088/0954-3899/38/4/045103	journal	March 2011
Collective vibrations in odd-mass thallium isotopes Covello, A.; Sartoris, G. Nuclear Physics A, Vol. 93, Issue 3 https://doi.org/10.1016/0375-9474(67)90301-6	journal	March 1967
Behavior of intruder based states in light Bi and Tl isotopes: the study of 187Bi α decay Batchelder, J. C.; Toth, K. S.; Bingham, C. R. The European Physical Journal A, Vol. 5, Issue 1 https://doi.org/10.1007/s100500050255	journal	May 1999
The Clover: a new generation of composite Ge detectors Duchêne, G.; Beck, F. A.; Twin, P. J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 432, Issue 1 https://doi.org/10.1016/S0168-9002(99)00277-6	journal	August 1999
First observation of excited states in 197At: the onset of deformation in neutron-deficient astatine nuclei Smith, M. B.; Chapman, R.; Cocks, J. F. C. The European Physical Journal A, Vol. 5, Issue 1 https://doi.org/10.1007/s100500050254	journal	May 1999
Shape coexistence in 185Tl and 187Tl — investigation of the deformed minima Lane, G. J.; Dracoulis, G. D.; Byrne, A. P. Nuclear Physics A, Vol. 586, Issue 2 https://doi.org/10.1016/0375-9474(94)00515-O	journal	April 1995
Positive-parity states in some odd-mass bismuth isotopes Alpsten, M.; Astner, G. Nuclear Physics A, Vol. 134, Issue 2 https://doi.org/10.1016/0375-9474(69)91064-1	journal	September 1969
Absolute transmission and separation properties of the gas-filled recoil separator RITU Sarén, J.; Uusitalo, J.; Leino, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 654, Issue 1 https://doi.org/10.1016/j.nima.2011.06.068	journal	October 2011
Shape-changing particle decays of ${}^{185}{Bi}$ and structure of the lightest odd-mass Bi isotopes Andreyev, A. N.; Ackermann, D.; Heβberger, F. P. Physical Review C, Vol. 69, Issue 5 https://doi.org/10.1103/PhysRevC.69.054308	journal	May 2004
Early Onset of Ground State Deformation in Neutron Deficient Polonium Isotopes Cocolios, T. E.; Dexters, W.; Seliverstov, M. D. Physical Review Letters, Vol. 106, Issue 5 https://doi.org/10.1103/PhysRevLett.106.052503	journal	February 2011
Experimental study of ${\frac{1}{2}}^{+}$ isomers in ${}^{199, 201}{At}$ Auranen, K.; Uusitalo, J.; Juutinen, S. Physical Review C, Vol. 90, Issue 2 https://doi.org/10.1103/PhysRevC.90.024310	journal	August 2014
Coexistence in odd-mass nuclei Heyde, K. Physics Reports, Vol. 102, Issue 5-6 https://doi.org/10.1016/0370-1573(83)90085-6	journal	December 1983
γ-ray spectroscopy of ${}^{197}{At}$ Andgren, K.; Jakobsson, U.; Cederwall, B. Physical Review C, Vol. 78, Issue 4 https://doi.org/10.1103/PhysRevC.78.044328	journal	October 2008
GEANT Monte Carlo simulations for the GREAT spectrometer Andreyev, A. N.; Butler, P. A.; Page, R. D. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 533, Issue 3 https://doi.org/10.1016/j.nima.2004.07.205	journal	November 2004
$γ$ -ray spectroscopy of ${}^{191, 193}{Bi}$ Nieminen, P.; Juutinen, S.; Andreyev, A. N. Physical Review C, Vol. 69, Issue 6 https://doi.org/10.1103/PhysRevC.69.064326	journal	June 2004
First observation of superdeformed states in 191Bi Nyman, M.; Juutinen, S.; Cullen, D. M. The European Physical Journal A, Vol. 51, Issue 3 https://doi.org/10.1140/epja/i2015-15031-2	journal	March 2015
Spectroscopy of the proton drip-line nucleus $^{203}$ Fr Jakobsson, U.; Juutinen, S.; Uusitalo, J. Physical Review C, Vol. 87, Issue 5 https://doi.org/10.1103/PhysRevC.87.054320	journal	May 2013
$γ$ decay of excited states in $^{198} Rn$ identified using correlated radioactive decay Taylor, R. B. E.; Freeman, S. J.; Durell, J. L. Physical Review C, Vol. 59, Issue 2 https://doi.org/10.1103/PhysRevC.59.673	journal	February 1999
Recoil-decay tagging study of $^{205}$ Fr Jakobsson, U.; Uusitalo, J.; Juutinen, S. Physical Review C, Vol. 85, Issue 1 https://doi.org/10.1103/PhysRevC.85.014309	journal	January 2012
Collectivity of ${}^{196}{Po}$ at low spin Grahn, T.; Dewald, A.; Greenlees, P. T. Physical Review C, Vol. 80, Issue 1 https://doi.org/10.1103/PhysRevC.80.014323	journal	July 2009
The GREAT triggerless total data readout method Lazarus, I.; Appelbe, E. E.; Butler, P. A. IEEE Transactions on Nuclear Science, Vol. 48, Issue 3 https://doi.org/10.1109/23.940120	journal	June 2001
Spectroscopy of ${}^{201}{At}$ including the observation of a shears band and the $29 / 2^{+}$ isomeric state Auranen, K.; Uusitalo, J.; Juutinen, S. Physical Review C, Vol. 91, Issue 2 https://doi.org/10.1103/PhysRevC.91.024324	journal	February 2015
$α$ decay of the very neutron-deficient isotopes $^{197 - 199}$ Fr Kalaninová, Z.; Andreyev, A. N.; Antalic, S. Physical Review C, Vol. 87, Issue 4 https://doi.org/10.1103/PhysRevC.87.044335	journal	April 2013
Decays of ${}^{194, 195, 196}{Pb}$ Hicks, K. H.; Ward, T. E.; Wiggins, J. Physical Review C, Vol. 25, Issue 5 https://doi.org/10.1103/PhysRevC.25.2710	journal	May 1982
Investigations into the alpha-decay of 195At Kettunen, H.; Enqvist, T.; Leino, M. The European Physical Journal A, Vol. 16, Issue 4 https://doi.org/10.1140/epja/i2002-10130-9	journal	April 2003
Energy levels in 197Tl populated in the Tl reaction Venos, D.; Adam, J.; Jursík, J. Nuclear Physics A, Vol. 280, Issue 1 https://doi.org/10.1016/0375-9474(77)90299-8	journal	April 1977
Measurements on prototype Ge and BGO detectors for the Eurogam array Beausang, C. W.; Forbes, S. A.; Fallon, P. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 313, Issue 1-2 https://doi.org/10.1016/0168-9002(92)90084-H	journal	March 1992
Gas-filled recoil separator for studies of heavy elements Leino, M.; Äystö, J.; Enqvist, T. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 99, Issue 1-4 https://doi.org/10.1016/0168-583X(94)00573-7	journal	May 1995
Grain—A Java data analysis system for Total Data Readout Rahkila, P. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 595, Issue 3 https://doi.org/10.1016/j.nima.2008.08.039	journal	October 2008
Nuclear Data Sheets for A = 207 Kondev, F. G.; Lalkovski, S. Nuclear Data Sheets, Vol. 112, Issue 3 https://doi.org/10.1016/j.nds.2011.02.002	journal	March 2011
Evaluation of theoretical conversion coefficients using BrIcc Kibédi, T.; Burrows, T. W.; Trzhaskovskaya, M. B. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 589, Issue 2 https://doi.org/10.1016/j.nima.2008.02.051	journal	May 2008
Laser spectroscopy studies of intruder states in ${}^{193, 195, 197}{Bi}$ Barzakh, A. E.; Fedorov, D. V.; Ivanov, V. S. Physical Review C, Vol. 94, Issue 2 https://doi.org/10.1103/PhysRevC.94.024334	journal	August 2016
A new test for random events of an exponential distribution Schmidt, K. H. The European Physical Journal A, Vol. 8, Issue 1 https://doi.org/10.1007/s100500070129	journal	July 2000
Tables of attenuation coefficients for angular distribution of gamma rays from partially aligned nuclei Der Mateosian, E.; Sunyar, A. W. Atomic Data and Nuclear Data Tables, Vol. 13, Issue 4 https://doi.org/10.1016/0092-640X(74)90007-2	journal	January 1974
The GREAT spectrometer Page, R. D.; Andreyev, A. N.; Appelbe, D. E. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 204 https://doi.org/10.1016/S0168-583X(02)02143-2	journal	May 2003
Alpha-decay studies of the new isotopes 191At and 193At Kettunen, H.; Enqvist, T.; Grahn, T. The European Physical Journal A, Vol. 17, Issue 4 https://doi.org/10.1140/epja/i2002-10162-1	journal	August 2003
$α$ decay studies of very neutron-deficient francium and radium isotopes Uusitalo, J.; Leino, M.; Enqvist, T. Physical Review C, Vol. 71, Issue 2 https://doi.org/10.1103/PhysRevC.71.024306	journal	February 2005
$α$ -decay studies of the francium isotopes $^{198}$ Fr and $^{199}$ Fr Uusitalo, J.; Sarén, J.; Juutinen, S. Physical Review C, Vol. 87, Issue 6 https://doi.org/10.1103/PhysRevC.87.064304	journal	June 2013
Low-lying structure of light radon isotopes Dobson, D. J.; Freeman, S. J.; Greenlees, P. T. Physical Review C, Vol. 66, Issue 6 https://doi.org/10.1103/PhysRevC.66.064321	journal	December 2002
$γ$ -ray and decay spectroscopy of $^{194, 195, 196}$ At Nyman, M.; Juutinen, S.; Darby, I. Physical Review C, Vol. 88, Issue 5 https://doi.org/10.1103/PhysRevC.88.054320	journal	November 2013
The GASP array Alvarez, Carlo Rossi Nuclear Physics News, Vol. 3, Issue 3 https://doi.org/10.1080/10506899308221154	journal	January 1993
High-spin states in ${}^{201, 203}{At}$ and the systematic behavior of $Z = 85$ isotopes Dybdal, K.; Chapuran, T.; Fossan, D. B. Physical Review C, Vol. 28, Issue 3 https://doi.org/10.1103/PhysRevC.28.1171	journal	September 1983
Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes Kesteloot, N.; Bastin, B.; Gaffney, L. P. Physical Review C, Vol. 92, Issue 5 https://doi.org/10.1103/PhysRevC.92.054301	journal	November 2015
Electromagnetic transition probabilities between the low-lying states of 203Tl, 205Tl and 209Bi Kratschmer, W.; Klapdor, H. V.; Grosse, E. Nuclear Physics A, Vol. 201, Issue 1 https://doi.org/10.1016/0375-9474(73)90695-7	journal	January 1973
Nuclear Data Sheets for A = 199 Singh, Balraj Nuclear Data Sheets, Vol. 108, Issue 1 https://doi.org/10.1016/j.nds.2007.01.001	journal	January 2007
α-decay properties of neutron-deficient polonium and radon nuclei Wauters, J.; Dendooven, P.; Huyse, M. Physical Review C, Vol. 47, Issue 4 https://doi.org/10.1103/PhysRevC.47.1447	journal	April 1993
Detailed spectroscopy of ${}^{193}{Bi}$ Herzáň, A.; Juutinen, S.; Auranen, K. Physical Review C, Vol. 92, Issue 4 https://doi.org/10.1103/PhysRevC.92.044310	journal	October 2015
$α$ Decay of Neutron-Deficient Odd Bi Nuclei: Shell-Model Intruder States in Tl and Bi Isotopes Coenen, E.; Deneffe, K.; Huyse, M. Physical Review Letters, Vol. 54, Issue 16 https://doi.org/10.1103/PhysRevLett.54.1783	journal	April 1985
A new test for random events of an exponential distribution Schmidt, K. H. The European Physical Journal A, Vol. 8, Issue 1 https://doi.org/10.1007/s100500050018	journal	January 2000
The GREAT triggerless total data readout method Lazarus, I. H.; Appelbe, D. E.; Butler, P. A. 2000 IEEE Nuclear Science Symposium. Conference Record (Cat. No.00CH37149) https://doi.org/10.1109/nssmic.2000.949943	conference	January 2000
Early onset of ground-state deformation in the neutron-deficient polonium isotopes Cocolios, T. E.; Dexters, W.; Seliverstov, M. D. arXiv https://doi.org/10.48550/arxiv.1010.2103	text	January 2010

Cited By (2)

Prompt and delayed spectroscopy of ${}^{203}{At}$ : Observation of a shears band and a $29 / 2^{+}$ isomeric state Auranen, K.; Uusitalo, J.; Juutinen, S. Physical Review C, Vol. 97, Issue 2 https://doi.org/10.1103/physrevc.97.024301	journal	February 2018
Charge radii and electromagnetic moments of ${}^{195 - 211}{At}$ Cubiss, J. G.; Barzakh, A. E.; Seliverstov, M. D. Physical Review C, Vol. 97, Issue 5 https://doi.org/10.1103/physrevc.97.054327	journal	May 2018