Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes

We study the shape coexistence in the nucleus 28 Si with the nuclear shell model using numerical diagonalizations complemented with variational calculations based on the projected generator-coordinate method. The theoretical electric quadrupole moments and transitions as well as the collective wave...

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Autores: Fricz, Dorian, Menéndez Sánchez, Javier, Rios Huguet, Arnau, Bally, Benjamin, Rodríguez, Tomás R., Márquez Romero, Antonio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/217962
Acceso en línea:https://hdl.handle.net/2445/217962
Access Level:acceso abierto
Palabra clave:Electromagnetisme
Física nuclear
Estructura nuclear
Electromagnetism
Nuclear physics
Nuclear structure
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spelling Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapesFricz, DorianMenéndez Sánchez, JavierRios Huguet, ArnauBally, BenjaminRodríguez, Tomás R.Márquez Romero, AntonioElectromagnetismeFísica nuclearEstructura nuclearElectromagnetismNuclear physicsNuclear structureWe study the shape coexistence in the nucleus 28 Si with the nuclear shell model using numerical diagonalizations complemented with variational calculations based on the projected generator-coordinate method. The theoretical electric quadrupole moments and transitions as well as the collective wave functions indicate that the standard USDB interaction in the sd shell describes well the ground-state oblate rotational band, but misses theexperimental prolate band. Guided by the quasi-SU(3) model, we show that the prolate band can be reproduced in the sd shell by reducing the energy of the 0d 3/2 orbital. Alternatively, in the extended sd p f configuration space a modification of the SDPF-NR interaction that accommodates cross-shell excitations also reproduces the oblate and prolate bands. Finally, we address the possibility of superdeformation in 28 Si within the sd p f space. Our results indicate that superdeformed structures appear at about 18–20 MeV.American Physical Society2025202520242025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion1 p.application/pdfhttps://hdl.handle.net/2445/217962Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevC.110.054326Physical Review C, 2024, vol. 110, p. 054326https://doi.org/10.1103/PhysRevC.110.054326(c) American Physical Society, 2024info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2179622026-05-29T05:05:01Z
dc.title.none.fl_str_mv Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
title Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
spellingShingle Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
Fricz, Dorian
Electromagnetisme
Física nuclear
Estructura nuclear
Electromagnetism
Nuclear physics
Nuclear structure
title_short Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
title_full Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
title_fullStr Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
title_full_unstemmed Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
title_sort Shell-model study of 28 Si: Coexistence of oblate, prolate, and superdeformed shapes
dc.creator.none.fl_str_mv Fricz, Dorian
Menéndez Sánchez, Javier
Rios Huguet, Arnau
Bally, Benjamin
Rodríguez, Tomás R.
Márquez Romero, Antonio
author Fricz, Dorian
author_facet Fricz, Dorian
Menéndez Sánchez, Javier
Rios Huguet, Arnau
Bally, Benjamin
Rodríguez, Tomás R.
Márquez Romero, Antonio
author_role author
author2 Menéndez Sánchez, Javier
Rios Huguet, Arnau
Bally, Benjamin
Rodríguez, Tomás R.
Márquez Romero, Antonio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Electromagnetisme
Física nuclear
Estructura nuclear
Electromagnetism
Nuclear physics
Nuclear structure
topic Electromagnetisme
Física nuclear
Estructura nuclear
Electromagnetism
Nuclear physics
Nuclear structure
description We study the shape coexistence in the nucleus 28 Si with the nuclear shell model using numerical diagonalizations complemented with variational calculations based on the projected generator-coordinate method. The theoretical electric quadrupole moments and transitions as well as the collective wave functions indicate that the standard USDB interaction in the sd shell describes well the ground-state oblate rotational band, but misses theexperimental prolate band. Guided by the quasi-SU(3) model, we show that the prolate band can be reproduced in the sd shell by reducing the energy of the 0d 3/2 orbital. Alternatively, in the extended sd p f configuration space a modification of the SDPF-NR interaction that accommodates cross-shell excitations also reproduces the oblate and prolate bands. Finally, we address the possibility of superdeformation in 28 Si within the sd p f space. Our results indicate that superdeformed structures appear at about 18–20 MeV.
publishDate 2024
dc.date.none.fl_str_mv 2024
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/217962
url https://hdl.handle.net/2445/217962
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1103/PhysRevC.110.054326
Physical Review C, 2024, vol. 110, p. 054326
https://doi.org/10.1103/PhysRevC.110.054326
dc.rights.none.fl_str_mv (c) American Physical Society, 2024
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2024
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1 p.
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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