Modified particle-rotor model and low-lying rotational bands in odd-A triaxial nuclei. (17th August 2017)

• Record Type: Journal Article
• Authors: Modi, Swati; Patial, M; Arumugam, P; Maglione, E; Ferreira, L S
• Is Part Of: Physica scripta. Volume 92:Number 9(2017:Sep.)
• Publication Date: 2017-08-17
• Subjects: triaxiality -- rotation-particle coupling -- collective levels; 21.10.Re -- 21.60.Ev -- 27.60.+j; Physics -- Periodicals; 530.05
• DOI: 10.1088/1402-4896/aa81ec
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: The low-lying rotational bands of triaxially deformed nuclei 137 Pr, 137 Pm and 139 Eu are studied with a modified particle-rotor model following the nonadiabatic quasiparticle approach. The matrix elements of the odd- A nucleus are obtained in terms of a coupling matrix and the rotational energies of the even–even core. The spectra of the cores 136 Ce, 136 Nd and 138 Sm indicate a strong influence of triaxial deformation and vibrational degrees of freedom. These properties are appropriately carried forward to the calculations for the odd- A nucleus. We demonstrate that the ground and side bands of the odd- A nucleus and its core can be explained with the same set of deformation parameters ( β 2, γ ). We argue that this method could be useful in studying the low-lying states in exotic nuclei also.