Interplay between the pairing and quadrupole interactions in the algebraic realization of the microscopic shell model

NUBA Conference Series -1: Nuclear Physics and Astrophysics

物理学;天文学

Drumev, Kalin^1 ; Georgieva, Ana^1

Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia

1784, Bulgaria^1

关键词: Algebraic models;    Algebraic realizations;    Competing features;    Nuclear systems;    Pairing-plus-quadrupole models;    Quadrupole interactions;    Shell models;    Two oscillators;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/590/1/012032/pdf
DOI  :  10.1088/1742-6596/590/1/012032

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We explore the algebraic realization of the Pairing-Plus-Quadrupole Model/PQM/ in the framework of the Elliott's SU(3) Model with the aim to obtain the complementary and competing features of the two interactions through the relation between the pairing and the SU(3) bases. First, we establish a correspondence between the SO(8) pairing basis and the Elliott's SU(3) basis. It is derived from their complementarity to the same LST coupling chain of the shell-model number-conserving algebra. The probability distribution of the SU(3) basis states within the SO(8) pairing states is also obtained and allows the investigation of the interplay between the pairing and quadrupole interactions in the Hamiltonian of the PQM, containing both of them as limiting cases. The description of some realistic N∼Z nuclear systems is investigated in a SU(3)-symmetry-adapted basis within a model space of one and two oscillator shells.