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Title: Unexpected distribution of ν 1 f 7 / 2 strength in Ca 49

Here, the calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic strengths associated with 1f 7/2 neutron hole states in 47,49Ca following one-neutron knockout reactions from 48,50Ca. The observed reduction of strength populating the 7/2 1 state in 49Ca, as compared to 47Ca, is inconsistent with shell-model calculations using both phenomenological interactions such as GXPF1, and interactions derived from microscopically based two- and three-nucleon forces. The result suggests a fragmentation of the l = 3 strength to higher-lying states as suggested by the microscopic calculations, but the observed magnitude of the reduction is not reproduced in any shell-model description.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [4] ;  [2] ;  [2] ;  [2] ;  [5] ;  [4] ;  [5] ;  [6] ;  [3] ;  [5] ;  [4] ;  [3] ;  [2] ;  [7] ;  [4] more »;  [8] ;  [4] ;  [2] ;  [9] ;  [4] ;  [9] ;  [10] ;  [11] ;  [12] ;  [4] ;  [2] ;  [13] ;  [3] « less
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Ohio Univ., Athens, OH (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Michigan State Univ., East Lansing, MI (United States)
  5. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
  6. TRIUMF, Vancouver, BC (Canada)
  7. The Univ. of Tokyo, Tokyo (Japan)
  8. Technische Univ. Darmstadt, Darmstadt (Germany); Univ. of York, York (United Kingdom)
  9. Technische Univ. Darmstadt, Darmstadt (Germany); GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
  10. Michigan State Univ., East Lansing, MI (United States); TRIUMF, Vancouver, BC (Canada)
  11. Univ. of Surrey, Surrey (United Kingdom)
  12. Technische Univ. Darmstadt, Darmstadt (Germany)
  13. Central Michigan Univ., Mount Pleasant, MI (United States); The Univ. of Tokyo, Tokyo (Japan)
Publication Date:
Grant/Contract Number:
AC02-06CH11357; AC02-05CH11231; FG02-88ER40387; NA0000979
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1366427
Alternate Identifier(s):
OSTI ID: 1365438; OSTI ID: 1398468; OSTI ID: 1400273