Year: 2017
Type: article
Abstract: Recently, I proposed a fast computing scheme for generalized seniority on a spherical single-particle basis [J. Phys. G: Nucl. Part. Phys. 42, 115105 (2015)]. This work redesigns the scheme to make it applicable to deformed single-particle basis. The algorithm is applied to the rare-earth-metal nucleus $_{64}^{158}\mathrm{Gd}_{94}$ for intrinsic (body-fixed frame) neutron excitations under the low-momentum NN interaction ${V}_{\mathrm{low}\text{\ensuremath{-}}k}$. By allowing as many as four broken pairs, I compute the lowest 300 intrinsic states of several multipolarities. These states converge well to the exact ones, showing generalized seniority is very effective in truncating the deformed shell model. Under realistic interactions, the picture remains approximately valid: The ground state is a coherent pair condensate and the pairs gradually break up as excitation energy increases.
Source: Physical Review C
Author: L. Y. Jia
Institution: University of Shanghai for Science and Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G2791715366
OpenAlex ID: W2963976735