Possible antimagnetic rotational band in In114

Zhenghua Zhao, C. B. Li, K. Y.,X. Wu, Y. Zheng,Yukun Pan,J. L. Wang, H. C. Zhang, Y. C. Hao,X. F. Li,G. S. Li, S. H. Yao,Chun He, Baosheng Yu,X. P. Cao, S. P. Hu,Jing Lu, Y. J.,Dong Yang,Haodi Wang,G. Y. Liu,Lili Li,Cheng Xu,Y. Y. Cheng

Physical Review C(2023)

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摘要
High-spin states of $^{114}\mathrm{In}$ were populated using the reaction $^{110}\mathrm{Pd}\phantom{\rule{4pt}{0ex}}(^{7}\mathrm{Li}, 3n)^{114}\mathrm{In}$ at a beam energy of 26 MeV. More than 30 new $\ensuremath{\gamma}$ transitions and 20 new levels are identified in $^{114}\mathrm{In}$. In total, three new bands and a short cascade are observed, among which a new negative-parity $\mathrm{\ensuremath{\Delta}}I=2$ band built on the $\ensuremath{\pi}{g}_{9/2}^{\ensuremath{-}2}{d}_{5/2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}$ configuration before the backbend and the $\ensuremath{\pi}{g}_{9/2}^{\ensuremath{-}2}{d}_{5/2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}^{3}$ configuration after the backbend is established. The properties of this band are discussed based on the classical particle-rotor model calculations. The predicted $B(E2)$ and ${\ensuremath{\mathfrak{I}}}^{(2)}/B(E2)$ ratios indicate that the $\mathrm{\ensuremath{\Delta}}I=2$ band after the backbend, has the characteristics of antimagnetic rotation. Meanwhile, the two-shears-like mechanism for the possible antimagnetic rotational band is examined by investigating the orientation of the angular momenta. A new positive-parity $\mathrm{\ensuremath{\Delta}}I=1$ band with the configuration of $\ensuremath{\pi}{g}_{9/2}^{\ensuremath{-}1}\ensuremath{\bigotimes}\ensuremath{\nu}({g}_{7/2}/{d}_{5/2}){h}_{11/2}^{2}$ is observed.
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possible antimagnetic rotational band
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