Shape evolution and coexistence in neutron-deficient Nd and Sm nuclei
Abstract
The evolution of shapes and low-energy shape coexistence is analyzed in neutron-deficient Nd and Sm nuclei, using a five-dimensional quadrupole collective Hamiltonian (5DCH). Deformation energy surfaces, calculated with the relativistic energy density functional PC-PK1 and a separable finite-range pairing interaction, exhibit a transition from spherical shapes near , to soft shapes, and to prolate deformed minima in lighter isotopes. The corresponding 5DCH model calculation, based on the self-consistent mean-field potentials, reproduces the empirical isotopic trend of characteristic collective observables, and predicts significantly different deformations for the first two states in the isotones Nd and Sm. In addition to bands based on the triaxial soft ground state, in excellent agreement with data, the occurrence of a low-energy rotational band is predicted, built on the prolate deformed () excited state .
Cite
@article{arxiv.1811.04574,
title = {Shape evolution and coexistence in neutron-deficient Nd and Sm nuclei},
author = {J. Xiang and Z. P. Li and W. H. Long and T. Nikši\' c and D. Vretenar},
journal= {arXiv preprint arXiv:1811.04574},
year = {2018}
}