New levels and transitions in 72 Ge following the decay of 72 Ga

Abstract

The decay of 72Ga has been investigated by means of γ-ray spectroscopy. The 72Ga nuclei were produced through the 71Ga(n, γ)72Ga reaction. The Compton-suppressed spectrometer and high-purity Ge detectors have been used singly and in coincidence, separately, to study γ-rays in the β− decay of 72Ga to 72Ge. Ninety-three events of γ-rays were reported, of which 7 were observed for the first time. A decay scheme of 72Ga including 4 new levels is proposed which accommodates 87 of these transitions. Spins and parities for new levels are proposed from calculated logft values, modes on the observed decay and some nuclear reaction experimental results.