Measurements of a partial cross section for the reaction Ni-58(n, gamma(0))Ni-59

The partial cross section for radiative neutron capture accompanied by gamm a transitions to the ground state of the Ni-59 nucleus was measured as a fu nction of energy by a new neutron-spectrometry method that employed the shi ft of a primary gamma transition in response to a change in the energy of t he captured neutron. The reaction Li-7(p, n)Be-7 was used as source of neut rons for the present measurements. The protons that induced this reaction w ere accelerated by a Van de Graaff electrostatic generator to energies exce eding the reaction threshold by 60 keV, in which case an appropriate geomet ry of the experiment permitted irradiation of the sample under study with n eutrons whose energy ranged between 10 and 120 keV. The partial widths of s ome resonances and radiative strength function for hard primary M1 gamma tr ansitions were determined in addition to the above cross sections. (C) 2000 MAIK "Nauka/Interperiodica".