Gamma ray slush hydrogen monitor

Abstract

Mass attenuation coefficients for ¹⁰⁹Cd radiation have been measured in single phases and mixtures of phases of five chemical compounds. As expected, the mass attenuation coefficients are independent of the phases of the test chemicals. As a result of this study, it is recommended that a slush hydrogen monitoring system based on low energy gamma ray attenuation be developed for use on board the National Aerospace Plane.