Low-lying state investigations of odd-A Mn isotopes around N=28

【摘要】 Based on the systematic studies for low-lying states of the odd-A^49-57Mn isotopes, the groundstates inversion and the rotational properties of a ground-state-based sequence are revealed and discussed. The energy levels of low-lying states and electromagnetic moments in odd-A^49-57Mn isotopes have been well reproduced in shell-model calculations, and the above phenomena could be understood with obviously different occupation numbers in proton orbitals such as πf_7/2 and πp_3/2, which changes similarly with the obtained quadrupole deformation in covariant density functional theory（CDFT）. After considering the coupling of collective rotation and intrinsic single-particle motion, the available experimental magnetic moments in ⁵³Mn and adjacent nuclei can be well explained with CDFT. The present calculations suggest that the 5/2^-and 7/2^-states in ⁵³Mn are formed by π5/2^-[312] and π7/2^-[303] respectively. Together with the behavior of levels, this provides proofs for the level sequences of low-lying states in ⁵³Mn distinct from the K^π= 5/2^-rotational band in ⁴⁹Cr and other odd-A Mn isotopes.更多还原

【Abstract】 Based on the systematic studies for low-lying states of the odd-A^49-57Mn isotopes, the groundstates inversion and the rotational properties of a ground-state-based sequence are revealed and discussed. The energy levels of low-lying states and electromagnetic moments in odd-A^49-57Mn isotopes have been well reproduced in shell-model calculations, and the above phenomena could be understood with obviously different occupation numbers in proton orbitals such as πf_7/2 and πp_3/2, which changes similarly with the obtained quadrupole deformation in covariant density functional theory（CDFT）. After considering the coupling of collective rotation and intrinsic single-particle motion, the available experimental magnetic moments in ⁵³Mn and adjacent nuclei can be well explained with CDFT. The present calculations suggest that the 5/2^-and 7/2^-states in ⁵³Mn are formed by π5/2^-[312] and π7/2^-[303] respectively. Together with the behavior of levels, this provides proofs for the level sequences of low-lying states in ⁵³Mn distinct from the K^π= 5/2^-rotational band in ⁴⁹Cr and other odd-A Mn isotopes.更多还原