Completing the nuclear reaction puzzle of the nucleosynthesis of Mo92

Tveten, G. M.; Spyrou, A.; Schwengner, R.; Naqvi, F.; Larsen, A. C.; Eriksen, T. K.; Bello Garrote, F. L.; Bernstein, L. A.; Bleuel, D. L.; Crespo Campo, L.; Guttormsen, M.; Giacoppo, F.; Görgen, A.; Hagen, T. W.; Hadynska-Klek, K.; Klintefjord, M.; Meyer, B. S.; Nyhus, H. T.; Renstrøm, T.; Rose, S. J.; Sahin, E.; Siem, S.; Tornyi, T. G.

doi:10.1103/PhysRevC.94.025804

Title: Completing the nuclear reaction puzzle of the nucleosynthesis of ${}^{92}{Mo}$

Journal Article · Mon Aug 22 04:00:00 UTC 2016 · Physical Review C

DOI: https://doi.org/10.1103/PhysRevC.94.025804 · OSTI ID:1357370

Tveten, G. M. ^[1]; Spyrou, A. ^[2]; Schwengner, R. ^[3]; Naqvi, F. ^[2]; Larsen, A. C. ^[1]; Eriksen, T. K. ^[4]; Bello Garrote, F. L. ^[1]; Bernstein, L. A. ^[5]; Bleuel, D. L. ^[5]; Crespo Campo, L. ^[1]; Guttormsen, M. ^[1]; Giacoppo, F. ^[6]; Görgen, A. ^[1]; Hagen, T. W. ^[1]; Hadynska-Klek, K. ^[7]; Klintefjord, M. ^[1]; Meyer, B. S. ^[8]; Nyhus, H. T. ^[1]; Renstrøm, T. ^[1]; Rose, S. J. ^[1] more »

Univ. of Oslo, Oslo (Norway)
Michigan State Univ., East Lansing, MI (United States)
Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
Univ. of Oslo, Oslo (Norway); The Australian National Univ., Canberra, ACT (Australia)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Oslo, Oslo (Norway); Helmholtz Institute Mainz, Mainz (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Univ. of Oslo, Oslo (Norway); INFN, Lab. Nazionali di Legnaro Padova, Legnaro (Italy)
Clemson Univ., Clemson, SC (United States)
The Australian National Univ., Canberra, ACT (Australia)

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1357370

Report Number(s):: LLNL-JRNL--704523

Journal Information:: Physical Review C, Journal Name: Physical Review C Journal Issue: 2 Vol. 94; ISSN PRVCAN; ISSN 2469-9985

Publisher:: APSCopyright Statement

Country of Publication:: United States

Language:: English

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