Renormalization of the Gamow-Teller operator within the realistic shell model

L. Coraggio, L. De Angelis, T. Fukui, A. Gargano, N. Itaco, F. Nowacki

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

In nuclear structure calculations, the choice of a limited model space, due to computational needs, leads to the necessity to renormalize the Hamiltonian as well as any transition operator. Here, we present a study of the renormalization procedure and effects of the Gamow-Teller operator within the framework of the realistic shell model. Our effective shell-model operators are obtained, starting from a realistic nucleon-nucleon potential, by way of the many-body perturbation theory in order to take into account the degrees of freedom that are not explicitly included in the chosen model space. The theoretical effective shell-model Hamiltonian and transition operators are then employed in shell-model calculations, whose results are compared with data of Gamow-Teller transition strengths and double-β half-lives for nuclei which are currently of interest for the detection of the neutrinoless double-β decay process, in a mass interval ranging from A=48 up to A=136. We show that effective operators are able to reproduce quantitatively the spectroscopic and decay properties without resorting to an empirical quenching neither of the axial coupling constant gA, nor of the spin and orbital gyromagnetic factors. This should assess the reliability of applying present theoretical tools to this problematic.

Original languageEnglish
Article number014316
JournalPhysical Review C
Volume100
Issue number1
DOIs
Publication statusPublished - Jul 23 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'Renormalization of the Gamow-Teller operator within the realistic shell model'. Together they form a unique fingerprint.

Cite this