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Title: Competing decay modes of a high-spin isomer in the proton-unbound nucleus ¹⁵⁸Ta*

An isomeric state at high spin and excitation energy was recently observed in the proton-unbound nucleus 158Ta. This state was observed to decay by both α and γ decay modes. The large spin change required to decay via γ-ray emission incurs a lifetime long enough for α decay to compete. The α decay has an energy of 8644(11) keV, which is among the highest observed in the region, a partial half-life of 440(70) μs and changes the spin by 11ℏ. In this study, additional evidence supporting the assignment of this α decay to the high-spin isomer in 158Ta will be presented.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [4] ;  [4] ;  [3] ;  [3] ;  [2] ;  [3] ;  [4] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [5] ;  [3] more »;  [3] ;  [3] ;  [3] ;  [3] ;  [6] ;  [7] « less
  1. Univ. of Surrey, Guildford (United Kingdom); Univ. of Liverpool, Liverpool (United Kingdom)
  2. Univ. of Liverpool, Liverpool (United Kingdom)
  3. Univ. of Jyvaskyla, Jyvaskyla (Finland)
  4. Royal Institute of Technology, Stockholm (Sweden)
  5. Univ. of Liverpool, Liverpool (United Kingdom); Daresbury Lab., Warrington (United Kingdom)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
  7. Daresbury Lab., Warrington (United Kingdom)
Publication Date:
OSTI Identifier:
1222719
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 46; Journal Issue: 3; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Research Org:
Argonne National Laboratory (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