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- Title
Nuclear Spin-Isospin Response within the Fayans Functional.
- Authors
Borzov, I. N.; Tolokonnikov, S. V.
- Abstract
An effective approximation to a fully self-consistent global description of the total force function of decay within the framework of the theory of finite Fermi systems is presented, based on the calculation of ground states within the framework of the modified energy density functional of Fayans et al. (DF3-f) and the continuum quasiparticle random phase approximation (CQRPA). The isovector parameter of the volume part of the functional has been refined, the permissible range of which was determined earlier by us from restrictions on the parameters of the equation of state for nuclear matter—the symmetry energy and its derivative at equilibrium density, obtained from a joint analysis of the value of the "neutron skin" of the nuclei Pb and Ca, found in the PREX-II and CREX experiments, results of ab initio calculations of the properties of the ground states of nuclei with the interaction of N3LO and systematics of data on the masses of neutron stars from astrophysical observations. New calculations of the Gamow–Teller strength functions for the reference doubly magic nuclei Pb and Sn, as well as for the nucleus Sn with developed neutron pairing have been carried out. In the proposed model, the global DF3-a + CQRPA calculations of beta-decay half-lives of heavy (quasi)spherical nuclei with –83 and s are conducted. Experimental lifetimes are described with accuracy up to factor 5.
- Subjects
EQUATIONS of state; NUCLEAR matter; STELLAR mass; NEUTRON stars; PHASES of matter; DARK energy; AB-initio calculations; NEUTRONS; FERMI energy
- Publication
Physics of Atomic Nuclei, 2023, Vol 86, Issue 4, p325
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/S1063778823040099