The -disintegration of RaD

Abstract

Electron-sensitive nuclear emulsion impregnated with RaD citrate was used. RaD events associated with β-particles of RaE were studied to determine the total number of developed grains produced in each RaD event. An analysis of the resulting grain-count distribution provides evidence of the occurrence of a ground-state to ground-state β-process in RaD with an intensity of 15.5 ± 3.5% of all disintegrations. The total intensity of excitation of the 46.5 keV state of RaE is thus 84.5 ± 3.5% and the intensity of conversion electrons from this state is 81 ± 4%. The last of these values is consistent with the results previously published by Wu, Boehm and Nagel and by Cranberg.