Effect of gamma-strength on nuclear reaction calculations

2016/11/13 by Kadenko, Igor, Plujko, Vladimir, Bondar, Borys +5
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1611.04108

Abstract

The results of the study of gamma-transition description in fast neutron capture and photofission are presented. Recent experimental data were used, namely, the spectrum of prompt gamma-rays in the energy range 2÷18 MeV from 14-MeV neutron capture in natural Ni and isomeric ratios in primary fragments of photofission of the isotopes of U, Np and Pu by bremsstrahlung with end-point energies E_e= 10.5, 12 and 18 MeV. The data are compared with the theoretical calculations performed within EMPIRE 3.2 and TALYS 1.6 codes. The mean value of angular momenta and their distributions were determined in the primary fragments ⁸⁴Br, ⁹⁷Nb, ⁹⁰Rb, ^131,133Te, ¹³²Sb, ^132,134I, ¹³⁵Xe of photofissions. An impact of the characteristics of nuclear excited states on the calculation results is studied using different models for photon strength function and nuclear level density.

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