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Title: Identification of a millisecond isomeric state in 129Cd81 via the detection of internal conversion and Compton electrons

The decay of an isomeric state in the neutron-rich nucleus 129Cd has been observed via the detection of internal conversion and Compton electrons providing first experimental information on excited states in this nucleus. The isomer was populated in the projectile fission of a 238U beam at the Radioactive Isotope Beam Factory at RIKEN. From the measured yields of γ-rays and internal conversion electrons, a multipolarity of E3 was tentatively assigned to the isomeric transition. A half-life of T1/2=3.6(2) ms was determined for the new state which was assigned a spin of (21/2+), based on a comparison to shell model calculations performed using state-of-the-art realistic effective interactions.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [4] ;  [4] ;  [2] ;  [5] ;  [4] ;  [6] ;  [4] ;  [7] ;  [4] ;  [8] ;  [9] ;  [4] ;  [4] ;  [10] ;  [4] more »;  [11] ;  [12] ;  [3] ;  [4] ;  [3] ;  [11] ;  [13] ;  [14] ;  [3] ;  [8] ;  [4] ;  [4] ;  [15] ;  [4] ;  [16] ;  [17] ;  [18] ;  [19] ;  [20] ;  [21] ;  [22] ;  [23] ;  [24] ;  [5] ;  [25] ;  [22] ;  [20] ;  [26] ;  [20] ;  [27] ;  [25] ;  [28] ;  [20] ;  [29] ;  [30] ;  [31] ;  [31] ;  [32] ;  [33] ;  [33] ;  [28] « less
  1. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Inst. de Estructura de la Materia; Univ. Autonoma de Madrid (Spain). Dept. de Fisica Teorica; RIKEN, Saitama (Japan)
  2. Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Inst. de Estructura de la Materia
  3. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  4. RIKEN, Saitama (Japan)
  5. Univ. Joseph Fourier Grenoble (France). Inst. National Polytechnique de Grenoble, Lab. de Physique Subatomique & Cosmologie (LPSC)
  6. Tohoku Univ., Sendai (Japan). Dept. of Physics
  7. Univ. of Brighton (United Kingdom). School of Computing, Engineering and Mathematics; RIKEN, Saitama (Japan)
  8. Technische Univ. Munchen, Garching (Germany). Dept. Physik
  9. Univ. Joseph Fourier Grenoble (France). Inst. National Polytechnique de Grenoble, Lab. de Physique Subatomique & Cosmologie (LPSC); Inst. Laue-Langevin (ILL), Grenoble (France); RIKEN, Saitama (Japan)
  10. Chung-Ang Univ., Seoul (Korea, Republic of). Dept. of Physics
  11. Inst. of Basic Science, Daejeon (Korea, Republic of). Rare Isotope Science Project
  12. Inst. of Basic Science, Daejeon (Korea, Republic of). Rare Isotope Science Project; Hanyang Univ., Seoul (Korea, Republic of). Dept. of Nuclear Engineering
  13. Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics
  14. RIKEN, Saitama (Japan); Univ. of Tokyo (Japan). Dept. of Physics
  15. MTA Atomki, Debrecen (Hungary); RIKEN, Saitama (Japan)
  16. Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics; RIKEN, Saitama (Japan)
  17. Osaka Univ. (Japan). Dept. of Physics
  18. Tokyo Univ. of Science, Chiba (Japan). Faculty of Science and Technology, Dept. of Physics
  19. Istituto Nazionale di Fisica Nucleare (INFN), Milano (Italy)
  20. Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
  21. Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
  22. Istituto Nazionale di Fisica Nucleare (INFN), Napoli (Italy). Complesso Univ. di Monte S. Angelo
  23. Univ. di Napoli Federico II, Complesso Univ. di Monte S. Angelo, Napoli (Italy). Dipartimento di Fisica
  24. Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France).
  25. Spanish National Research Council (CSIC), Valencia (Spain). Univ. of Valencia (UV), Inst. de Fisica Corpuscular
  26. Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
  27. Australian National Univ., Canberra, ACT (Australia). Research School of Physical Sciences and Engineering, Dept. of Nuclear Physics
  28. Univ. of Cologne (Germany). Inst. fur Kernphysik
  29. Yale Univ., New Haven, CT (United States). Wright Nuclear Structure Lab.
  30. Univ. of Tokyo (Japan). Dept. of Physics
  31. Osaka Univ., (Japan). Dept. of Physics
  32. Katholieke Univ. Leuven, Heverlee (Belgium). Inst. voor Kern- en Stralingsfysica; Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
  33. Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
Publication Date:
OSTI Identifier:
1213865
Grant/Contract Number:
AC02-06CH11357; FPA2009-13377-C02; FPA2011-29854-C04; PROMETEO/2010/101; 25247045; NRF-2012R1A1A1041763; 2009-0093817; K-100835; 300096; 05P12RDCIA; 05P12RDNUP
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 738; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
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; Isomeric decays; Transition strengths; Shell model calculations