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Level structure in the transitional nucleus 199Tl
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DOI：10.1103/PhysRevC.97.034331.png)
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Abstract
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High-spin level structures of Tl-199 have been studied by in-beam gamma-ray spectroscopic methods using the Pt-196(Li-7, 4n)Tl-199 reaction at 40 MeV of beam energy. A large number of new states have been found, resulting in a significant extension of the previously known level scheme with the observation of 44 new transitions and 33 new levels. By comparing with the level structures in the odd-mass Tl isotopes and the even-even core Hg nuclei, configurations are proposed for the newly observed rotational bands and states in Tl-199. The properties of the strongly coupled positive-and negative-parity bands can be interpreted in terms of the cranked Nilsson-Strutinsky-Bogoliubov model calculations, which show that the observed bands are built on the oblate shapes.
Keywords:
LIGHT THALLIUM ISOTOPES
HIGH-SPIN STATES
SHAPE COEXISTENCE
ROTATIONAL BANDS
SUPERDEFORMED BANDS
OBLATE SHAPE
CHIRAL BANDS
MASS NUCLEI
T1 NUCLEI
TI NUCLEI
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