Neutron spectrometry method for partial radiative capture cross-section measurements

The reported neutron spectrometry method is based on primary γ-transition energy shifts. It has been demonstrated in measurements of the partial radiative capture cross-section of the ⁵⁸Ni(n,γ) ⁵⁹Ni reaction at the example of γ-transitions to the ground and second excited states of ⁵⁹Ni. The reaction ⁷Li(p, n) is used to produce resonance neutrons by means of the proton beam of a Van de Graaff accelerator. A compact geometry allows one to improve the luminosity and to employ a rather wide neutron spectrum of up to ∼100 keV. Both partial radiative parameters of some neutron resonances and partial cross sections for population of the low-lying states of the daughter nucleus ⁵⁹Ni are obtained. The results are compared with the data obtained by the time-of-flight method.