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Title: Isomer spectroscopy of neutron-rich $$^{165,167}$$Tb

We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165,167Tb 100,102. The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238U primary beam on a 2 mm 9Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the μs regime measured using the EURICA gamma-ray spectrometer. Metastable-state decays are identified in 165Tb and 167Tb and interpreted as arising from hindered E1 decay from the 72 [523] single quasi-proton Nilsson configuration to rotational states built on the 32 [411] single quasi-proton ground state. Lastly, these data correspond to the first spectroscopic information in the heaviest, odd-A terbium isotopes reported to date and provide information on proton Nilsson configurations which reside close to the Fermi surface as the 170Dy doubly-midshell nucleus is approached.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [1] ;  [3] ;  [1] ;  [3] ;  [5] ;  [3] ;  [3] ;  [6] ;  [7] ;  [8] ;  [1] ;  [9] ;  [9] ;  [10] ;  [11] more »;  [12] ;  [13] ;  [14] ;  [15] ;  [16] ;  [17] ;  [18] ;  [19] ;  [12] ;  [14] ;  [20] ;  [1] ;  [21] ;  [22] ;  [23] ;  [3] ;  [24] ;  [25] ;  [3] ;  [12] ;  [26] ;  [3] ;  [3] ;  [26] ;  [22] ;  [1] ;  [21] ;  [17] ;  [1] ;  [27] ;  [28] ;  [29] ;  [1] ;  [30] ;  [26] ;  [1] ;  [3] ;  [3] ;  [4] ;  [22] ;  [12] ;  [31] « less
  1. Univ. of Surrey, Guildford (United Kingdom)
  2. Univ. of Surrey, Guildford (United Kingdom); National Physical Lab., Teddington (United Kingdom)
  3. RIKEN Nishina Center, Saitama (Japan)
  4. Beihang Univ., Beijing (China)
  5. Univ. of Surrey, Guildford (United Kingdom); National Physical Lab., Teddington (United Kingdom); RIKEN Nishina Center, Saitama (Japan)
  6. Univ. of Hong Kong (Hong Kong); KU Leuven, Leuven (Belgium)
  7. RIKEN Nishina Center, Saitama (Japan); Univ. of Tokyo, Tokyo (Japan)
  8. RIKEN Nishina Center, Saitama (Japan); Tohoku Univ., Miyagi (Japan)
  9. Univ. of Brighton (United Kingdom)
  10. Australian National Univ., Canberra, ACT (Australia)
  11. Argonne National Lab. (ANL), Argonne, IL (United States)
  12. Osaka Univ., Toyonaka (Japan)
  13. RIKEN Nishina Center, Saitama (Japan); Peking Univ., Beijing (China)
  14. Xin Jiaotong Univ. (China)
  15. Peking Univ., Beijing (China)
  16. RIKEN Nishina Center, Saitama (Japan); Hungarian Academy of Sciences, Debrecen (Hungary)
  17. Chung-Ang Univ., Seoul (Republic of Korea)
  18. Univ. of Hong Kong (Hong Kong)
  19. RIKEN Nishina Center, Saitama (Japan); VNU Hanoi Univ. of Science, Hanoi (Vietnam)
  20. Almajmaah Univ. (Saudi Arabia)
  21. Sungkyunkwan Univ., Suwon (Korea)
  22. Hungarian Academy of Sciences, Debrecen (Hungary)
  23. KU Leuven, Leuven (Belgium); Univ. of Edinburgh, Edinburgh (United Kingdom)
  24. Univ. of Edinburgh, Edinburgh (United Kingdom)
  25. Osaka Univ., Toyonaka (Japan); Osaka Univ. Osaka (Japan)
  26. GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
  27. Hosea Univ., Chungnam (Korea)
  28. Tohoku Univ., Miyagi (Japan)
  29. Univ. of Brighton (United Kingdom); Horia Hulubei National Institute of Physics and Engineering, Bucharest (Romania)
  30. Univ. College Dublin, Dublin (Ireland)
  31. Instituto Nazionale di Fisica Nucleare, Legnaro (Italy)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 48; Journal Issue: 3; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1364650