Gamma Decays, Lifetimes and Spins of 47V Excited States

Abstract

The nucleus 47y has been studied using the 47Ti(p, ny)47y reaction, with isotopically enriched 47Ti targets, incident proton energies from 4·7 to 5·4 MeY, and Ge(Li) y-ray detectors. The previously unreported y-decay of the second excited state was observed. Energies of the first seven excited states were deduced to be 87· 5 ±0·1, 145· 7 ±O· 2, 259'6±0'4, 660·1 ±O' 3, 1138· 3 ±0'4, 1272'2±0'4 and 1295·1 ±0'4 keY. Their y-decay branching ratios were measured. The lifetimes of the last four mentioned states were deduced from attenuated Doppler shifts to be 680~~:go, 96O~!Jgo, 390~ ~~g and > 750 fs respectively. Angular distribution measurements resulted in the assignment of In = 9/2-to the 1272 keY level and J = 9/2 or 11/2 to the 1295 keY level. The results are discussed in the light of the Coriolis-coupling model.