Density measurement by radiometric method with gamma irradiation from sources of low activity

The method to obtain the density of the media by gamma-irradiation is proposed. The main issue of this method is the analytical calculation of the spectrum measured by gamma-spectrometer; this calculation provides information about scattered gamma-quants in a beam. Thus, this method precludes the use of collimators in experiments, therefore, this made it possible to avoid using very high-activity sources of ionizing radiation: we present the experimental results with gamma-sources of activity ∼10⁴ Bq. (paper)