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Observation of a $$pi rm h_{9/2} bigotimes nu rm i_{13/2}$$ oblate band in $$^{188}$$Tl

Zhou, X. H.*; Ma, L.*; Xing, Y. B.*; Zhang, Y. H.*; Guo, Y. X.*; Lei, X. G.*; Xie, C. Y.*; Oshima, Masumi; Toh, Yosuke  ; Koizumi, Mitsuo ; Osa, Akihiko ; Hatsukawa, Yuichi; Sugawara, Masahiko*; Ndontchueng, M. M.*

Excited states in $$^{188}$$Tl have been studied experimentally by in-beam $$gamma$$-ray spectroscopy. A rotational band built on the $$pi rm h_{9/2} bigotimes nu rm i_{13/2}$$ configuration with oblate deformation has been established for $$^{188}$$Tl. Based on the structure systematics of the oblate $$pi rm h_{9/2} bigotimes nu rm i_{13/2}$$ bands in heavier odd-odd Tl nuclei, we have tentatively proposed spin values for the new band in $$^{188}$$Tl. The new oblate band shows low-spin signature inversion, and it can be interpreted qualitatively by the two-quasiparticle plus rotor model including a $$J$$-dependent $$p$$-$$n$$ residual interaction.

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Category:Physics, Nuclear

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