Rotational bands in the light odd-mass Tl nuclei

Abstract

The odd-mass nuclei 191–197Tl have been formed in a variety of (HI, xn) reactions and studied by in-beam spectroscopic techniques. The decay of the high-spin Pb isomers, also formed in (HI, xn) reactions, leading to 193–197Tl has also been investigated. Evidence is presented for the existence of levels of the previously proposed 9 2 −[505] rotational bands in the nuclei. Tentative evidence is given for the existence of oblate rotational bands, based on the 13 2 +[606] state, in 191–195Tl.