Nuclear β-decay half-lives within the subtracted second random-phase approximation.
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| Title: | Nuclear β-decay half-lives within the subtracted second random-phase approximation. |
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| Authors: | Gambacurta, D.1 (AUTHOR) danilo.gambacurta@lns.infn.it, Grasso, M.2 (AUTHOR) |
| Source: | European Physical Journal A -- Hadrons & Nuclei. Jun2025, Vol. 61 Issue 6, p1-11. 11p. |
| Subjects: | Coupling constants, Tin |
| Abstract: | We employ, within the framework of Skyrme energy-density functional theory, the subtracted second random-phase approximation, recently developed for charge-exchange excitations, to compute β -decay half-lives in four nuclei, 24 O, 34 Si, 78 Ni, and 132 Sn. Following our recent results on the description of the Gamow–Teller strength, we proceed coherently in the present work by computing β -decay half-lives using the bare value of the axial-vector coupling constant g A . Half-lives are thus obtained, within the allowed Gamow–Teller approximation, without the use of any ad hoc quenching factors. A genuine quenching is indeed microscopically introduced in our model owing to the correlations induced by the coupling of one-particle one-hole configurations with two-particle two-hole ones. The role of the so-called J 2 terms is also studied. By comparing our results with experimental data, we show a general improvement of β -decay half-lives with respect to results obtained within the commonly used Random Phase Approximation (RPA). The inclusion of the two-particle two-hole configurations produces a more fragmented and richer spectrum within the β -window, resulting in lower β half-lives with respect to the RPA ones. [ABSTRACT FROM AUTHOR] |
| Copyright of European Physical Journal A -- Hadrons & Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 186711573 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Nuclear β-decay half-lives within the subtracted second random-phase approximation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gambacurta%2C+D%2E%22">Gambacurta, D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> danilo.gambacurta@lns.infn.it</i><br /><searchLink fieldCode="AR" term="%22Grasso%2C+M%2E%22">Grasso, M.</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+A+--+Hadrons+%26+Nuclei%22">European Physical Journal A -- Hadrons & Nuclei</searchLink>. Jun2025, Vol. 61 Issue 6, p1-11. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Coupling+constants%22">Coupling constants</searchLink><br /><searchLink fieldCode="DE" term="%22Tin%22">Tin</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We employ, within the framework of Skyrme energy-density functional theory, the subtracted second random-phase approximation, recently developed for charge-exchange excitations, to compute β -decay half-lives in four nuclei, 24 O, 34 Si, 78 Ni, and 132 Sn. Following our recent results on the description of the Gamow–Teller strength, we proceed coherently in the present work by computing β -decay half-lives using the bare value of the axial-vector coupling constant g A . Half-lives are thus obtained, within the allowed Gamow–Teller approximation, without the use of any ad hoc quenching factors. A genuine quenching is indeed microscopically introduced in our model owing to the correlations induced by the coupling of one-particle one-hole configurations with two-particle two-hole ones. The role of the so-called J 2 terms is also studied. By comparing our results with experimental data, we show a general improvement of β -decay half-lives with respect to results obtained within the commonly used Random Phase Approximation (RPA). The inclusion of the two-particle two-hole configurations produces a more fragmented and richer spectrum within the β -window, resulting in lower β half-lives with respect to the RPA ones. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Physical Journal A -- Hadrons & Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1140/epja/s10050-025-01611-8 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 1 Subjects: – SubjectFull: Coupling constants Type: general – SubjectFull: Tin Type: general Titles: – TitleFull: Nuclear β-decay half-lives within the subtracted second random-phase approximation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gambacurta, D. – PersonEntity: Name: NameFull: Grasso, M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 14346001 Numbering: – Type: volume Value: 61 – Type: issue Value: 6 Titles: – TitleFull: European Physical Journal A -- Hadrons & Nuclei Type: main |
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