A γ-ray transmission method for measuring the density of chlorinated pellet material is described. It can be used for density correction in the thermal neutron transmission gauge. The principle of measurement
choice of γ- ray source
response of lithium glass to γ- rays and mass attenuation coefficient of γ-rays for the material are discussed. The mass attenuation coefficient has been determined experimentally and the relative error of the density measurement is about 2%.