Quasicontinuum γ decay of Zr91,92 : Benchmarking indirect ( n,γ ) cross section measurements for the s process

Guttormsen, M.; Goriely, S.; Larsen, A. C.; Gorgen, A.; Hagen, T. W.; Renstrom, T.; Siem, S.; Syed, N. U.  H.; Tagliente, G.; Toft, H. K.; Utsunomiya, H.; Voinov, A. V.; Wikan, K.

doi:10.1103/PhysRevC.96.024313

Title: Quasicontinuum $γ$ decay of ${}^{91, 92}{Zr}$ : Benchmarking indirect ( $n, γ$ ) cross section measurements for the $s$ process

Journal Article · Mon Aug 21 00:00:00 EDT 2017 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.96.024313· OSTI ID:1432345

Guttormsen, M. ^[1]; Goriely, S. ^[2]; Larsen, A. C. ^[1]; Gorgen, A. ^[1]; Hagen, T. W. ^[1]; Renstrom, T. ^[1]; Siem, S. ^[1]; Syed, N. U. H. ^[1]; Tagliente, G. ^[3]; Toft, H. K. ^[1]; Utsunomiya, H. ^[4]; Voinov, A. V. ^[5]; Wikan, K. ^[1]

Univ. of Oslo (Norway). Dept. of Physics
Free Univ. of Brussels (Belgium). Inst. of Astronomy and Astrophysics
National Inst. of Nuclear Physics (INFN), Bari (Italy)
Konan Univ., Kobe (Japan). Dept. of Physics
Ohio Univ., Athens, OH (United States). Dept. of Physics and Astronomy

Here, nuclear level densities (NLDs) and γ-ray strength functions (γSFs) have been extracted from particle-γ coincidences of the ⁹²Zr(p,p´γ) ⁹²Zr and ⁹²Zr (p,dγ) ⁹¹Zr reactions using the Oslo method. The new ^91,92Zr γSF data, combined with photonuclear cross sections, cover the whole energy range from Eγ ≈ 1.5 MeV up to the giant dipole resonance at Eγ ≈ 17 MeV. The wide-range γSF data display structures at Eγ ≈ 9.5 MeV, compatible with a superposition of the spin-flip M1 resonance and a pygmy E1 resonance. Furthermore, the γSF shows a minimum at Eγ ≈ 2–3 MeV and an increase at lower γ-ray energies. The experimentally constrained NLDs and γSFs are shown to reproduce known (n,γ) and Maxwellian-averaged cross sections for ^91,92Zr using the TALYS reaction code, thus serving as a benchmark for this indirect method of estimating (n,γ) cross sections for Zr isotopes.

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Research Organization:: Ohio Univ., Athens, OH (United States); Univ. of Oslo (Norway)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); Research Council of Norway (NFR); European Research Council (ERC); Fund for Scientific Research (FRS-FNRS)

Grant/Contract Number:: NA0002905; 210007; 205528; 637686

OSTI ID:: 1432345

Alternate ID(s):: OSTI ID: 1375672

Journal Information:: Physical Review C, Vol. 96, 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: 19 works

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Title: Quasicontinuum γ decay of Zr 91 , 92 : Benchmarking indirect ( n , γ ) cross section measurements for the s process

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Cited By (2)

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Title: Quasicontinuum $γ$ decay of ${}^{91, 92}{Zr}$ : Benchmarking indirect ( $n, γ$ ) cross section measurements for the $s$ process