Level structure of175Lu

Abstract

Eleven gamma-ray transitions have been identified in 175Lu, by pefforming singles, prompt ~--~ coincidenee and delayed ~--~ coincidence measurements using Ge(Li), hyper pure Ge and NaI (TI) detectors. Two of these transitions (18 and 28.5 keV) have been observed for the first time and ate of value in supporting a recently reported energy level at 371 keV.Energy levels of rotational bands, 1-/2 [541]; 5+/2 [402] and 7+/2 [404] have been fitted using the angular momentum expansion. The required parameters ate given. The previously doubted spins 15-/2 (1137 keV) and the 21-/2 (1078 keV) in the band 1-/2 [541] have been theoretieally eonfirmed while an experimental energy state at 845 keV of doubted spin 13+/2 could be reasonably fitted to the 5+/2 [402] rotational band.