Abstract
Nuclear reaction analysis (NRA) is a powerful tool for determining the absolute hydrogen concentration in materials. Based on the assumption that all hydrogen atoms form silanol species in glasses, NRA allows for measurements of the water concentration. For a precise determination of the absolute hydrogen concentration, it is necessary to obtain the γ-ray detection efficiency of the system. However, it is confirmed that some polymer materials suffer from damage under the 15N2+ bombardment where a substantial amount of hydrogen is lost. This causes a large error in the quantification of the hydrogen concentration in samples. In the present study, it was shown that a Kapton® thin film mounted on a Cu block is useful for the calibration standard for determining the γ-ray detection efficiency.
