The decay of 48Sc and 48V

Abstract

The decays of 48Sc and 48V have been studied with Ge(Li) diodes, scintillation spectrometers and a double focussing beta-ray spectrometer. The 3507 keV level, from which originates the quadruple cascade (9.4±0.5)% in the 48Sc decay, is also de-excited by a 1212 keV cross-over transition to the 2295 keV (4 +) level and supports the assumption, that the 3507 keV level has a spin 6 +. The first member of the reported triple cascade in the 48V decay is shown to be a doublet of 928.9±0.7 (1.2±0.2)% and 944.3±0.5 keV (8.0±0.5)% gamma rays, both followed by the 1311.4–983.3 keV cascade. Evidence was found, that the 2421 keV (2 +) level is excited by weak gamma rays from high-energy levels. The K/ β + ration in the 48V decay is 0.69±0.05 The Q-values of 48Sc and 48V are calculated to be 3986±7 keV and if 4015±4 keV, respectively. The energy of the gamma ray of 47Sc, which is present as an impurity, is 159.2±0.5 keV.