Prolate yrast cascade in 183Tl

W. Reviol*, M. P. Carpenter, R. V.F. Janssens, D. Jenkins, K. S. Toth, C. R. Bingham, L. L. Riedinger, W. Weintraub, J. A. Cizewski, T. Lauritsen, D. Seweryniak, J. Uusitalo, I. Wiedenhöver, R. Wadsworth, A. N. Wilson, C. J. Gross, J. C. Batchelder, K. Helariutta, S. Juutinen

*Corresponding author for this work

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Abstract

The yrast sequence in 183Tl has been studied for the first time in recoil-mass selected γ-ray spectroscopic measurements. A rotational-like cascade of seven transitions is established down to the band head with probable spin and parity (13/2+). Unlike in the adjacent odd-mass Tl nuclei, prompt γ decay from the yrast band to a lower lying weakly deformed (oblate) structure is not observed. These features are consistent with the predicted drop of the prolate band head in 183Tl compared to 185Tl. The implications for the prolate energy minimum in odd-mass Tl nuclei at the neutron i 13/2 midshell (N = 103) are discussed.

Original languageEnglish
Article number044310
Pages (from-to)443101-443107
Number of pages7
JournalPhysical Review C - Nuclear Physics
Volume61
Issue number4
Publication statusPublished - 1 Jan 2000

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