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Calculation of cross sections for metastable state production in the $$(n,gamma)$$, $$(n,n')$$, $$(n,2n)$$ and $$(n,3n)$$ reactions of $$^{93}$$Nb

Ichihara, Akira

Toward the revision of $$^{93}$$Nb data in JENDL-4.0, we calculated cross sections for metastable state production in the $$(n,gamma)$$, $$(n,n')$$, $$(n,2n)$$ and $$(n,3n)$$ reactions in the incident energy range from 7 keV to 20 MeV. The cross sections were computed on the basis of nuclear reaction models (the spherical optical model, the multi-step statistical model, preequilibrium models, and the distorted-wave Born approximation). By adjusting the parameters in nuclear spin densities and the number of discrete states, we could obtain the metastable state production cross sections which were almost consistent with the measured data. The obtained $$^{93}$$Nb$$(n,n')$$$$^{93m}$$Nb cross section was in good agreement with the experiments in the incident energies below 10 MeV, in comparison with JENDL/A-96.

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Category:Nuclear Science & Technology

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