The authors report a study of the low-lying states of the deformed 21Ne nucleus within the framework of the quantum-number projected generator coordinate method (PGCM), starting from a chiral two-nucleon-plus-three-nucleon (NN+3N) interaction.
The nuclear wave functions are constructed as a linear combination of a set of axially-deformed Hartree-Fock-Bogliubov (HFB) wave functions with different quadrupole deformations. These HFB wave functions are projected onto different angular momenta and the correct neutron and proton numbers for 21Ne.
The results of calculations based on the effective Hamiltonians derived by normal-ordering the 3N interaction with respect to three different reference states, including the quantum-number projected HFB wave functions for 20Ne, 22Ne, and an ensemble of them with equal weights, are compared.
The inclusion of the three-nucleon interaction is found to significantly impact the low-lying states of 21Ne. Without the three-nucleon interaction, the energy spectrum becomes more stretched, and the quadrupole collectivity is notably reduced. The energy spectra from the Hamiltonians normal-ordered with respect to 20Ne and 22Ne are very close to each other.
To Another Language
from source content
arxiv.org
Viktige innsikter hentet fra
by W. Lin, E. F... klokken arxiv.org 10-02-2024
https://arxiv.org/pdf/2403.01177.pdfDypere Spørsmål