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Report No.

Photoneutron cross sections for Mo isotopes; A Step toward a unified understanding of($$gamma$$,n) and (n,$$gamma$$)reactions

Utsunomiya, Hiroaki*; Goriely, S.*; Kondo, Takeo*; Iwamoto, Chihiro*; Akimune, Hidetoshi*; Yamagata, Tamio*; Toyokawa, Hiroyuki*; Harada, Hideo   ; Kitatani, Fumito  ; Lui, Y.-W.*; Larsen, A. C.*; Guttormsen, M.*; Koehler, P. E.*; Hilaire, S.*; P$'e$ru, S.*; Martini, M.*; Koning, A. J.*

Photoneutron cross sections were measured for $$^{94}$$Mo,$$^{95}$$Mo,$$^{96}$$Mo, $$^{97}$$Mo,$$^{98}$$Mo, and $$^{100}$$Mo near the neutron threshold with quasi-monochromatic laser-Compton scattering $$gamma$$-rays. The photoneutron data were analyzed with the Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model and the axially-symmetric-deformed Gogny HFB plus QRPA model of E1 $$gamma$$-ray strength. Combining the $$gamma$$-ray strength function constrained by the present photoneutron data with either the nuclear resonance fluorescence data or the updated Oslo data to supplement the data below the neutron threshold, a thorough analysis of the reverse (n,$$gamma$$) cross sections is made whenever measurements are available. The Oslo data and the corresponding uncertainties are updated based on the latest results of the s-wave neutron spacing and the average radiative width determined in particular for $$^{96}$$Mo.



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Category:Physics, Nuclear



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