中性子による重水濃度の測定

概要

論文の詳細を見る
Studies on the analysis of heavy water concentrations by fast neutrons were carried out. When heavy water is irradiated by fast neutrons, there is a correlation between the heavy water concentration and the amount of thermal neutrons in heavy water. Ten mCi of <SUP>241</SUP>Am-Be was used as a fast neutron source, and the heavy water volumes used in the experiments were 1, 2 and 5 liters. It is found from the experimental results that there are following relationships between the heavy water concentration(C)and counting rate(N)of thermal neutrons in heavy water: N=K1 exp(-PC)at the concen-tration of less than 80mole%, and N=-K2C+q at the concentration of greater than 80mole%. The sensitivity of this heavy water analysis, which is defined as the minimum change of the heavy water concentration to be detected, is 0.5mole% on the average. Boron and ur anium, which are neutron absorbers in heavy water, decrease daccuracy of the analysis, and the effect of the void was also determined.
日本質量分析学会の論文