Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer

The structure of Ge-80 has been investigated at the ISOLDE facility at CERN. A previous study reported for the first time a low-lying 0(2)(+) intruder state at 639 keV, based on the coincidence with a previously unobserved 1764-keV gamma ray, and suggested it as evidence for shape coexistence in Ge-...

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Autores: Fraile Prieto, Luis Mario, Mach, Henryk Andrzej, Paziy, Vadym, otros, ...
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/4456
Acceso en línea:https://hdl.handle.net/20.500.14352/4456
Access Level:acceso abierto
Palabra clave:539.1
Shape coexistence
Shell-model
Isotopes
Nuclei
Beam
Física nuclear
2207 Física Atómica y Nuclear
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repository_id_str
spelling Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomerFraile Prieto, Luis MarioMach, Henryk AndrzejPaziy, Vadymotros, ...539.1Shape coexistenceShell-modelIsotopesNucleiBeamFísica nuclear2207 Física Atómica y NuclearThe structure of Ge-80 has been investigated at the ISOLDE facility at CERN. A previous study reported for the first time a low-lying 0(2)(+) intruder state at 639 keV, based on the coincidence with a previously unobserved 1764-keV gamma ray, and suggested it as evidence for shape coexistence in Ge-80. We used the beta decay from the 3(-) 22.4-keV state in Ga-80 to enhance the population of low-spin states in Ge-80, including any excited 0(+) level, and gamma gamma coincidences to investigate it. We observed a 1764-keV gamma ray in coincidence with strong transitions in Ge-80, thus not feeding the proposed 639-keV 0(2)(+). No connecting transitions from previously known levels to the 639-keV and 2403-keV 2(3)(+) states could be established either. Shell-model calculations for Ge isotopes and N = 48 isotones were performed. They succeed to explain most of the experimental levels, but fail to reproduce the presence of a 0(2)(+) state below approximate to 1200 keV in Ge-80. Our experimental findings and shell-model calculations are difficult to reconcile with a very low-lying 0(2)(+) state in Ge-80.Amer Physical SocUniversidad Complutense de Madrid20212021-08-1020212021-08-10journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/4456reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/44562026-06-02T12:44:21Z
dc.title.none.fl_str_mv Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
title Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
spellingShingle Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
Fraile Prieto, Luis Mario
539.1
Shape coexistence
Shell-model
Isotopes
Nuclei
Beam
Física nuclear
2207 Física Atómica y Nuclear
title_short Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
title_full Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
title_fullStr Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
title_full_unstemmed Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
title_sort Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
dc.creator.none.fl_str_mv Fraile Prieto, Luis Mario
Mach, Henryk Andrzej
Paziy, Vadym
otros, ...
author Fraile Prieto, Luis Mario
author_facet Fraile Prieto, Luis Mario
Mach, Henryk Andrzej
Paziy, Vadym
otros, ...
author_role author
author2 Mach, Henryk Andrzej
Paziy, Vadym
otros, ...
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 539.1
Shape coexistence
Shell-model
Isotopes
Nuclei
Beam
Física nuclear
2207 Física Atómica y Nuclear
topic 539.1
Shape coexistence
Shell-model
Isotopes
Nuclei
Beam
Física nuclear
2207 Física Atómica y Nuclear
description The structure of Ge-80 has been investigated at the ISOLDE facility at CERN. A previous study reported for the first time a low-lying 0(2)(+) intruder state at 639 keV, based on the coincidence with a previously unobserved 1764-keV gamma ray, and suggested it as evidence for shape coexistence in Ge-80. We used the beta decay from the 3(-) 22.4-keV state in Ga-80 to enhance the population of low-spin states in Ge-80, including any excited 0(+) level, and gamma gamma coincidences to investigate it. We observed a 1764-keV gamma ray in coincidence with strong transitions in Ge-80, thus not feeding the proposed 639-keV 0(2)(+). No connecting transitions from previously known levels to the 639-keV and 2403-keV 2(3)(+) states could be established either. Shell-model calculations for Ge isotopes and N = 48 isotones were performed. They succeed to explain most of the experimental levels, but fail to reproduce the presence of a 0(2)(+) state below approximate to 1200 keV in Ge-80. Our experimental findings and shell-model calculations are difficult to reconcile with a very low-lying 0(2)(+) state in Ge-80.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-08-10
2021
2021-08-10
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/4456
url https://hdl.handle.net/20.500.14352/4456
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Amer Physical Soc
publisher.none.fl_str_mv Amer Physical Soc
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301629

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