A careful study of the y-rays following the 70Zn(p, ny)1°Ga reaction has shown no evidence for a first excited state at 188 keY in 70Ga. However, a 188 keY y-ray transition was found to de-excite the 879 keY level in 7 0 Ga, whose half-life was measured to be 24±3 ns.
The Doppler shift attenuation method of lifetime determination has been employed following the 62.64Ni(p, ny)62.64 Cu and 67. 70Zn(p, ny)67. 70Ga reactions. The lifetime of the 62CU state at 637 keY was found to be 220 :':1~g fs; lower limits of 230 and 250 fs were set for the levels at 426 and 548 keY respectively. For 6 4 CU, a lower limit of 175 fs was set for both the 609 and 663 keY states. Lifetimes
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.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.