Measurements of keV-neutron capture cross sections and capture gamma-ray spectra of¹⁰⁵Pd

Abstract

The neutron capture cross sections and capture gamma-ray spectra of 105 Pd were measured in the region from 15 to 100 keV and at 585 keV. A neutron time-of-flight method was utilised with an anti-Compton NaI(Tl) spectrometer and a 1.5-ns pulsed neutron source by the 7 Li(p,n) 7 Be reaction. The capture yields were obtained by applying a pulse-height weighting technique to the observed net capture gamma-ray pulse-height spectra. The capture cross sections of 105 Pd were derived with errors less than 5%, using the standard capture cross sections of 197 Au. The evaluated capture cross sections of JENDL-4.0 and ENDF/B-VII.1 were compared with the present results. The evaluations of JENDL-4.0 and ENDF/B-VII.1 were larger than the present results by 3%-15% in the region from 15 to 100 keV and at 585 keV. The capture gamma-ray spectra of 105 Pd were also derived by unfolding the observed net capture gamma-ray pulseheight spectra. The multiplicities of capture gamma rays of 105 Pd were obtained from the capture gammaray spectra.