On the validity of the rotor model in the odd-Z nucleide 171LU

Publisher Website
Google Scholar
Abstract
A metallic thulium target is irradiated with 28 MeV α-particles to produce the 169Tm(α, 2 n) 171Lu reaction. The excitation functions for the observed γ-rays and the angular distributions of these γ-rays are studied. A search is made for isomeric transitions with half-lives longer than 10 ns. The 137.05 keV γ-ray depopulating the 1/2+ [411] state into the 1/2- [541] level is found to have a half-life of 33 ± 8 ns. No other delayed transitions are observed. Rotational bands built on the 1/2+ [411], 5/2+ [402], 7/2+ [404] (ground state), 1/2- [541] and 9/2- [514] intrinsic states are observed. The properties of these bands are examined with respect to deviations from the rotor model. There is some evidence for the existence of coupling terms having Δ K = 2 and it is necessary to allow for a variable moment of inertia in order to explain the available data. As usual the assumption of independent quasiparticle motion overestimates the effect of the Coriolis force

This publication has 8 references indexed in Scilit: