E1 transition probabilities between the nilsson states [formula omitted

Abstract

The half-lives of the 1 2 , 1 2 +[411] level at 208.1 keV in 171Lu and of the 1 2 , 1 2 +[411] and 3 2 , 1 2 + [411] levels at 425.0 and 434.6 keV in 173Lu have been measured in the decay of 171Hf and 173Hf to be 29.7±1.1 ns, 0.82±0.20 ns and 0.46±0.20 ns, respectively. These half-lives yield the absolute γ-ray transition probabilities of the El transition from 1 2 , 1 2 + [411] to 1 2 , 1 2 −[541] in 171Lu and of the E1 transitions from 1 2 , 1 2 +[411] to the spin 1 2 and 1 2 members of the 1 2 − [541] band and from 3 2 , 1 2 + [411] to the spin 3 2 and 5 2 members of the 1 2 − [541] band in 173Lu. These absolute transition probabilities are found to be in good agreement with the Nilsson estimate, taking into account pairing correlations and Coriolis coupling.