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Systematic investigation of the high-spin structures in the odd-odd nuclei \\(^{166, 168, 170, 172}\\)Re by a particle-number conserving method
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Systematic investigation of the high-spin structures in the odd-odd nuclei \\(^{166, 168, 170, 172}\\)Re by a particle-number conserving method
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Systematic investigation of the high-spin structures in the odd-odd nuclei \\(^{166, 168, 170, 172}\\)Re by a particle-number conserving method
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Paper
Systematic investigation of the high-spin structures in the odd-odd nuclei \\(^{166, 168, 170, 172}\\)Re by a particle-number conserving method
2021
Overview
The recently observed two and four-quasiparticle high-spin rotational bands in the odd-odd nuclei \\(^{166, 168, 170, 172}\\)Re are investigated using the cranked shell model with pairing correlations treated by a particle-number conserving method. The experimental moments of inertia and alignments can be reproduced well by the present calculation if appropriate bandhead spins and configurations are assigned for these bands, which in turn confirms their spin and configuration assignments. It is found that the bandhead spins of those two rotational bands observed in \\(^{166}\\)Re~[Li {\\it et al.}, Phys. Rev. C 92 014310 (2015)] should be both increased by \\(2\\hbar\\) to get in consistent with the systematics of the experimental and calculated moments of inertia for the same configurations in \\(^{168, 170, 172}\\)Re. The variations of the backbendings/upbendings with increasing neutron number in these nuclei are investigated. The level crossing mechanism is well understood by analysing the variations of the occupation probabilities of the single-particle states close to the Fermi surface and their contributions to the angular momentum alignment with rotational frequency. In addition, the influence of the deformation driving effects of the proton \\(1/2^-[541]\\) (\\(h_{9/2}\\)) orbtial on the level crossing in \\(^{172}\\)Re is also discussed.
Publisher
Cornell University Library, arXiv.org
