Photoneutron reaction cross section measurements on Mo94 and Zr90 relevant to the p -process nucleosynthesis

Banu, A.; Meekins, E. G.; Silano, J. A.; Karwowski, H. J.; Goriely, S.

doi:10.1103/physrevc.99.025802

Title: Photoneutron reaction cross section measurements on ${}^{94}{Mo}$ and ${}^{90}{Zr}$ relevant to the $p$ -process nucleosynthesis

Journal Article · Mon Feb 11 00:00:00 EST 2019 · Physical Review C

DOI:https://doi.org/10.1103/physrevc.99.025802· OSTI ID:1658816

Banu, A. ^[1]; Meekins, E. G. ^[1]; Silano, J. A. ^[2]; Karwowski, H. J. ^[2]; Goriely, S. ^[3]

James Madison Univ., Harrisonburg, VA (United States)
Triangle Universities Nuclear Laboratory, Durham, NC (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
Université Libre de Bruxelles, Brussels (Belgium)

The photodisintegration cross sections for the 94Mo(gamma,n) and 90Zr(gamma,n) reactions have been experimentally investigated with quasi-monochromatic photon beams at the High Intensity gamma-ray Source (HIgammaS) facility of the Triangle Universities Nuclear Laboratory (TUNL). The energy dependence of the photoneutron reaction cross sections was measured with high precision from the respective neutron emission thresholds up to 13.5 MeV. These measurements contribute to a broader investigation of nuclear reactions relevant to the understanding of the p-process nucleosynthesis. The results are compared with the predictions of Hauser-Feshbach statistical model calculations using two different models for the dipole gamma-ray strength function. The resulting 94Mo(gamma,n) and 90Zr(gamma,n) photoneutron stellar reaction rates as a function of temperature in the typical range of interest for the p-process nucleosynthesis show how sensitive the photoneutron stellar reaction rate can be to the experimental data in the vicinity of the neutron threshold.

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Research Organization:: University of North Carolina, Chapel Hill, NC (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FG02-97ER41033; AC52-07NA27344; FG02-97ER41041

OSTI ID:: 1658816

Alternate ID(s):: OSTI ID: 1494222; OSTI ID: 1497975; OSTI ID: 1658959

Report Number(s):: LLNL-JRNL-752885; arXiv: 1808.04937; TRN: US2203359

Journal Information:: Physical Review C, Vol. 99, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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References (52)

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Title: Photoneutron reaction cross section measurements on Mo 94 and Zr 90 relevant to the p -process nucleosynthesis

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Title: Photoneutron reaction cross section measurements on ${}^{94}{Mo}$ and ${}^{90}{Zr}$ relevant to the $p$ -process nucleosynthesis