Indirect determination of neutron-capture cross sections for Sm isotopes

Abstract

Neutron-capture cross sections in the energy range of 0.01--10 MeV for $^{146,148,150,152}\mathrm{Sm}$ nuclei were calculated using the $\ensuremath{\gamma}$-ray strength and level density functions extracted from the Oslo-type experiments. The uncertainties in the cross-section values were determined using a Monte Carlo method. For the $^{148,150,152}\mathrm{Sm}$ isotopes, the calculated cross sections are in a good agreement with the existing experimental data and for the $^{146}\mathrm{Sm}$ nucleus, an experimental $(n,\ensuremath{\gamma})$ cross section is reported for the first time. The results are compared with the ENDF, EAF, and TENDL evaluations. Maxwellian-averaged cross sections were also calculated using the same input $\ensuremath{\gamma}\mathrm{SF}$ and LD functions.