Decays of 50Sc, 50Sc/sup m/, 50Ca, and 47K

Gamma rays from the decays of 50Sc, 50Sc/sup m/, 50Ca, and 47K, produced by 48Ca+t reactions at E/sub t/ = 3.2 MeV, were investigated with a Ge(Li) detector. A 3.5-MV Van de Graaff and a ''rabbit'' target-transfer system were used. Precision energy measurements resulted in the following γ-ray energies (in keV): 50Sc, 523.792(18), 1121.124(5), and 1553.768(8); 50Ca, 71.552(5), 256.894(10), 1519.300(20), and 1590.850(30). Relative γ-ray intensities were also measured and more accurate β- and γ-ray branches in the decay schemes of 50Sc, 50Ca, and 47K were obtained. Limits were set on unobserved branches and, in 50Sc decay, five new β- branches were found. By using a short timing cycle it was found that a possible β- branch from 50Sc/sup m/ to the 2+ 1554-keV state of 50Ti is <2.5%. An incidental result was a value of 520.436(15) keV for the lowest energy γ ray in 83Rb decay. The β- decay of 50Sc is compared to shell-model predictions