Prolate yrast cascade in [Formula Presented]

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

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The yrast sequence in [Formula Presented] 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 [Formula Presented] 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 [Formula Presented] compared to [Formula Presented] The implications for the prolate energy minimum in odd-mass Tl nuclei at the neutron [Formula Presented] midshell [Formula Presented] are discussed.

Original languageEnglish
Number of pages1
JournalPhysical Review C - Nuclear Physics
Issue number4
Publication statusPublished - 1 Jan 2000

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