β-Spectra of RaD

Abstract

Although a large number of works have been devoted to the study of RaD emission, still little is known about the intensities of RaD β-spectra and their shape. The study of RaD β-spectra is a difficult experimental problem because RaD β-particles have very low energies. This energy region is strongly affected by electron scattering on the walls and apertures of the instrument, electron scattering from the source lining, energy losses in the radioactive preparation itself, in the film on the window of the Geiger-Muller counter. Very intense conversion lines of nuclear transition with energy 46.5 kev are located close to the boundary of β-spectra. In the 5-12 kev region, there are a large number of Auger L-series electron lines that overlap with the RaD β-spectra. All this makes it very difficult to determine the boundary and shape of the spectra.