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Title: Completing the nuclear reaction puzzle of the nucleosynthesis of Mo92

One of the greatest questions for modern physics to address is how elements heavier than iron are created in extreme astrophysical environments. A particularly challenging part of that question is the creation of the so-called p-nuclei, which are believed to be mainly produced in some types of supernovae. Here, the lack of needed nuclear data presents an obstacle in nailing down the precise site and astrophysical conditions. In this work, we present for the first time measurements on the nuclear level density and average γ strength function of 92Mo. State-of-the-art p-process calculations systematically underestimate the observed solar abundance of this isotope. Our data provide stringent constraints on the 91Nb(p,γ) 92Mo reaction rate, which is the last unmeasured reaction in the nucleosynthesis puzzle of 92Mo. Based on our results, we conclude that the 92Mo abundance anomaly is not due to the nuclear physics input to astrophysical model calculations.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [1] ;  [4] ;  [1] ;  [5] ;  [5] ;  [1] ;  [1] ;  [6] ;  [1] ;  [1] ;  [7] ;  [1] ;  [8] ;  [1] ;  [1] ;  [1] more »;  [1] ;  [1] ;  [9] « less
  1. Univ. of Oslo, Oslo (Norway)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
  4. Univ. of Oslo, Oslo (Norway); The Australian National Univ., Canberra, ACT (Australia)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Univ. of Oslo, Oslo (Norway); Helmholtz Institute Mainz, Mainz (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  7. Univ. of Oslo, Oslo (Norway); INFN, Lab. Nazionali di Legnaro Padova, Legnaro (Italy)
  8. Clemson Univ., Clemson, SC (United States)
  9. The Australian National Univ., Canberra, ACT (Australia)
Publication Date:
Report Number(s):
LLNL-JRNL-704523
Journal ID: ISSN 2469-9985; PRVCAN
Grant/Contract Number:
AC52-07NA27344; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
APS
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1357370
Alternate Identifier(s):
OSTI ID: 1328608