Relative intensities of prompt γ-rays from the 35Cl(n,γ)36Cl reaction with thermal neutrons as secondary γ-ray intensity standards

Abstract

The relative intensities of 16 prompt γ-rays from the 35Cl(n,γ)36Cl reaction with a thermal neutron were precisely determined as secondary γ-ray intensity standards with HPGe detectors. The detection efficiencies were calibrated from 0.2 to 10.8MeV using the standard sources 152Eu and 56Co and the 14N(n,γ)15N reaction. We performed appropriate analyses for the evaluation of doublet peaks, subtraction of mixing with escape γ-rays and other corrections; consequently, the values were determined within 1% accuracy. Relative intensities in the range of 0.7 to 8.6MeV are proposed as reliable secondary standards for 16 γ-rays.