Impurity effects of the Λ hyperon in the hypernuclear systems Λ25Mg and Λ29Si. (17th September 2021)

• Record Type: Journal Article
• Authors: Cui, Ji-Wei; Zhou, Xian-Rong
• Is Part Of: Communications in theoretical physics. Volume 73:Number 11(2021)
• Publication Date: 2021-09-17
• Subjects: Λ hypernuclei -- Skyrme–Hartree–Fock model -- angular momentum projection -- generator coordinate method; Physics -- Periodicals; 530.105
• DOI: 10.1088/1572-9494/ac06bd
• Languages: English
• ISSNs: 0253-6102

Abstract

Abstract: Based on the beyond-mean-field Skyrme–Hartree–Fock model, impurity effects of the Λ hyperon in the hypernuclear systems Λ 25 Mg and Λ 29 Si are investigated, respectively. Four cases, in which the Λ hyperon occupies the single-particle orbitals Λ [000] 1 2 +, Λ [110] 1 2 −, Λ [101] 3 2 − and Λ [101] 1 2 −, are focused. In each case, the potential energy surface and the energy curves projected on certain angular momenta are employed to show the influence of the Λ hyperon on the nuclear core. Beside the shrinkage effect that is induced by the Λ hyperon occupying the s Λ orbital, it is found that the Λ hyperon on the p Λ orbital, Λ [110] 1 2 −, drives the nuclear core toward a prolate shape, while the ones on the other two p Λ orbitals, Λ [101] 3 2 − and Λ [101] 1 2 −, drive the nuclear core toward an oblate shape. The energy spectra and the corresponding intra-band E 2 transition rates for the rotational bands are given as a prediction for future experiments.