Nuclear structure model for double-charge-exchange processes
- Autores
- Ferreira, Vitor dos S.; Samana, Arturo Rodolfo; Krmpotić, Francisco; Chiapparini, Marcelo
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A new model, based on the BCS approach, is especially designed to describe nuclear phenomena (A, Z) → (A, Z ± 2) of double-charge exchange (DCE). Although it was proposed and applied in the particle-hole limit, by one of the authors [Krmpotić, Fizika B 14, 139 (2005)], it has not yet been applied within the BCS mean-field framework, nor has its ability to describe DCE processes been thoroughly explored. It is a natural extension of the pn-QRPA model, developed by Halbleib and Sorensen [Nucl. Phys. A 98, 542 (1967)] to describe the single β decays (A, Z) → (A, Z ± 1), to the DCE processes. As such, it exhibits several advantages over the pn-QRPA model when used in the evaluation of the double beta decay (DBD) rates. For instance, (i) the extreme sensitivity of the nuclear matrix elements (NMEs) on the model parametrization does not occur; (ii) it allows us to study the NMEs, not only for the ground state in daughter nuclei, as the pn-QRPA model does, but also for all final 0⁺ and 2⁺ states, accounting at the same time for their excitation energies and the corresponding DBD Q values; (iii) together with the DBD-NMEs it also provides the energy spectra of Fermi and Gamow-Teller DCE transition strengths, as well as the locations of the corresponding resonances and their sum rules; (iv) the latter are relevant for both the DBD and the DCE reactions, since the underlying nuclear structure is the same; this correlation does not exist within the pn-QRPA model. As an example, detailed numerical calculations are presented for the (A, Z) → (A, Z + 2) process in ⁴⁸Ca → ⁴⁸Ti and the (A, Z) → (A, Z − 2) process in ⁹⁶Ru → ⁹⁶Mo, involving all final 0⁺ states and 2⁺ states.
Facultad de Ciencias Exactas
Instituto de Física La Plata - Materia
-
Física
Charge-exchange reactions
Double beta decay
Lifetimes & widths
Nuclear structure & decays
Nuclear many-body theory - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/132963
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Nuclear structure model for double-charge-exchange processesFerreira, Vitor dos S.Samana, Arturo RodolfoKrmpotić, FranciscoChiapparini, MarceloFísicaCharge-exchange reactionsDouble beta decayLifetimes & widthsNuclear structure & decaysNuclear many-body theoryA new model, based on the BCS approach, is especially designed to describe nuclear phenomena (A, Z) → (A, Z ± 2) of double-charge exchange (DCE). Although it was proposed and applied in the particle-hole limit, by one of the authors [Krmpotić, Fizika B 14, 139 (2005)], it has not yet been applied within the BCS mean-field framework, nor has its ability to describe DCE processes been thoroughly explored. It is a natural extension of the pn-QRPA model, developed by Halbleib and Sorensen [Nucl. Phys. A 98, 542 (1967)] to describe the single β decays (A, Z) → (A, Z ± 1), to the DCE processes. As such, it exhibits several advantages over the pn-QRPA model when used in the evaluation of the double beta decay (DBD) rates. For instance, (i) the extreme sensitivity of the nuclear matrix elements (NMEs) on the model parametrization does not occur; (ii) it allows us to study the NMEs, not only for the ground state in daughter nuclei, as the pn-QRPA model does, but also for all final 0⁺ and 2⁺ states, accounting at the same time for their excitation energies and the corresponding DBD Q values; (iii) together with the DBD-NMEs it also provides the energy spectra of Fermi and Gamow-Teller DCE transition strengths, as well as the locations of the corresponding resonances and their sum rules; (iv) the latter are relevant for both the DBD and the DCE reactions, since the underlying nuclear structure is the same; this correlation does not exist within the pn-QRPA model. As an example, detailed numerical calculations are presented for the (A, Z) → (A, Z + 2) process in ⁴⁸Ca → ⁴⁸Ti and the (A, Z) → (A, Z − 2) process in ⁹⁶Ru → ⁹⁶Mo, involving all final 0⁺ states and 2⁺ states.Facultad de Ciencias ExactasInstituto de Física La Plata2020-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/132963enginfo:eu-repo/semantics/altIdentifier/issn/2469-9985info:eu-repo/semantics/altIdentifier/issn/2469-9993info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevc.101.044314info:eu-repo/semantics/altIdentifier/arxiv/1910.09059info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:21Zoai:sedici.unlp.edu.ar:10915/132963Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:22.013SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Nuclear structure model for double-charge-exchange processes |
title |
Nuclear structure model for double-charge-exchange processes |
spellingShingle |
Nuclear structure model for double-charge-exchange processes Ferreira, Vitor dos S. Física Charge-exchange reactions Double beta decay Lifetimes & widths Nuclear structure & decays Nuclear many-body theory |
title_short |
Nuclear structure model for double-charge-exchange processes |
title_full |
Nuclear structure model for double-charge-exchange processes |
title_fullStr |
Nuclear structure model for double-charge-exchange processes |
title_full_unstemmed |
Nuclear structure model for double-charge-exchange processes |
title_sort |
Nuclear structure model for double-charge-exchange processes |
dc.creator.none.fl_str_mv |
Ferreira, Vitor dos S. Samana, Arturo Rodolfo Krmpotić, Francisco Chiapparini, Marcelo |
author |
Ferreira, Vitor dos S. |
author_facet |
Ferreira, Vitor dos S. Samana, Arturo Rodolfo Krmpotić, Francisco Chiapparini, Marcelo |
author_role |
author |
author2 |
Samana, Arturo Rodolfo Krmpotić, Francisco Chiapparini, Marcelo |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Física Charge-exchange reactions Double beta decay Lifetimes & widths Nuclear structure & decays Nuclear many-body theory |
topic |
Física Charge-exchange reactions Double beta decay Lifetimes & widths Nuclear structure & decays Nuclear many-body theory |
dc.description.none.fl_txt_mv |
A new model, based on the BCS approach, is especially designed to describe nuclear phenomena (A, Z) → (A, Z ± 2) of double-charge exchange (DCE). Although it was proposed and applied in the particle-hole limit, by one of the authors [Krmpotić, Fizika B 14, 139 (2005)], it has not yet been applied within the BCS mean-field framework, nor has its ability to describe DCE processes been thoroughly explored. It is a natural extension of the pn-QRPA model, developed by Halbleib and Sorensen [Nucl. Phys. A 98, 542 (1967)] to describe the single β decays (A, Z) → (A, Z ± 1), to the DCE processes. As such, it exhibits several advantages over the pn-QRPA model when used in the evaluation of the double beta decay (DBD) rates. For instance, (i) the extreme sensitivity of the nuclear matrix elements (NMEs) on the model parametrization does not occur; (ii) it allows us to study the NMEs, not only for the ground state in daughter nuclei, as the pn-QRPA model does, but also for all final 0⁺ and 2⁺ states, accounting at the same time for their excitation energies and the corresponding DBD Q values; (iii) together with the DBD-NMEs it also provides the energy spectra of Fermi and Gamow-Teller DCE transition strengths, as well as the locations of the corresponding resonances and their sum rules; (iv) the latter are relevant for both the DBD and the DCE reactions, since the underlying nuclear structure is the same; this correlation does not exist within the pn-QRPA model. As an example, detailed numerical calculations are presented for the (A, Z) → (A, Z + 2) process in ⁴⁸Ca → ⁴⁸Ti and the (A, Z) → (A, Z − 2) process in ⁹⁶Ru → ⁹⁶Mo, involving all final 0⁺ states and 2⁺ states. Facultad de Ciencias Exactas Instituto de Física La Plata |
description |
A new model, based on the BCS approach, is especially designed to describe nuclear phenomena (A, Z) → (A, Z ± 2) of double-charge exchange (DCE). Although it was proposed and applied in the particle-hole limit, by one of the authors [Krmpotić, Fizika B 14, 139 (2005)], it has not yet been applied within the BCS mean-field framework, nor has its ability to describe DCE processes been thoroughly explored. It is a natural extension of the pn-QRPA model, developed by Halbleib and Sorensen [Nucl. Phys. A 98, 542 (1967)] to describe the single β decays (A, Z) → (A, Z ± 1), to the DCE processes. As such, it exhibits several advantages over the pn-QRPA model when used in the evaluation of the double beta decay (DBD) rates. For instance, (i) the extreme sensitivity of the nuclear matrix elements (NMEs) on the model parametrization does not occur; (ii) it allows us to study the NMEs, not only for the ground state in daughter nuclei, as the pn-QRPA model does, but also for all final 0⁺ and 2⁺ states, accounting at the same time for their excitation energies and the corresponding DBD Q values; (iii) together with the DBD-NMEs it also provides the energy spectra of Fermi and Gamow-Teller DCE transition strengths, as well as the locations of the corresponding resonances and their sum rules; (iv) the latter are relevant for both the DBD and the DCE reactions, since the underlying nuclear structure is the same; this correlation does not exist within the pn-QRPA model. As an example, detailed numerical calculations are presented for the (A, Z) → (A, Z + 2) process in ⁴⁸Ca → ⁴⁸Ti and the (A, Z) → (A, Z − 2) process in ⁹⁶Ru → ⁹⁶Mo, involving all final 0⁺ states and 2⁺ states. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-04 |
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format |
article |
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eng |
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eng |
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http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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