Multi-quasiparticle sub-nanosecond isomers in W-178

We report on the first measurement of the half-lives of K-pi = 11(-) and 12(+) four-quasiparticle states in the even-even nucleus W-178. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr3(Ce) scintillator detectors of the NuBall array at the AL...

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Detalhes bibliográficos
Autores: Benito García, Jaime, Fraile Prieto, Luis Mario, Sánchez-Tembleque Verbo, Victor, Vedia Fernández, María Victoria
Tipo de documento: artigo
Data de publicação:2020
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositório:Docta Complutense
Idioma:inglês
OAI Identifier:oai:docta.ucm.es:20.500.14352/6191
Acesso em linha:https://hdl.handle.net/20.500.14352/6191
Access Level:Acceso aberto
Palavra-chave:539.1
Lifetime measurements
Spectroscopy
Nuclei
Decay
Física nuclear
2207 Física Atómica y Nuclear
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oai_identifier_str oai:docta.ucm.es:20.500.14352/6191
network_acronym_str ES
network_name_str España
repository_id_str
spelling Multi-quasiparticle sub-nanosecond isomers in W-178Benito García, JaimeFraile Prieto, Luis MarioSánchez-Tembleque Verbo, VictorVedia Fernández, María Victoria539.1Lifetime measurementsSpectroscopyNucleiDecayFísica nuclear2207 Física Atómica y NuclearWe report on the first measurement of the half-lives of K-pi = 11(-) and 12(+) four-quasiparticle states in the even-even nucleus W-178. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr3(Ce) scintillator detectors of the NuBall array at the ALTO facility in Orsay, France. The half-lives of these states only became experimentally accessible by the combination of several experimental techniques - scintillator fast timing, isomer spectroscopy with a pulsed beam, and the event-by-event calorimetry information provided by the NuBall array. The measured half-lives are 476(44)ps and 275(65)ps for the I-pi = 11(-) and 12(+) states, respectively. The decay transitions include weakly hindered E1 and E2 branches directly to the ground-state band, bypassing the two-quasiparticle states. This is the first such observation for an E1 transition. The interpretation of the small hindrance hinges on mixing between the ground-state band and the t-band. (C) 2019 The Author(s). Published by Elsevier B.V.Elsevier Science BVUniversidad Complutense de Madrid20202020-02-1020202020-02-10journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/6191reponame: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:20.500.14352/61912026-06-02T12:44:21Z
dc.title.none.fl_str_mv Multi-quasiparticle sub-nanosecond isomers in W-178
title Multi-quasiparticle sub-nanosecond isomers in W-178
spellingShingle Multi-quasiparticle sub-nanosecond isomers in W-178
Benito García, Jaime
539.1
Lifetime measurements
Spectroscopy
Nuclei
Decay
Física nuclear
2207 Física Atómica y Nuclear
title_short Multi-quasiparticle sub-nanosecond isomers in W-178
title_full Multi-quasiparticle sub-nanosecond isomers in W-178
title_fullStr Multi-quasiparticle sub-nanosecond isomers in W-178
title_full_unstemmed Multi-quasiparticle sub-nanosecond isomers in W-178
title_sort Multi-quasiparticle sub-nanosecond isomers in W-178
dc.creator.none.fl_str_mv Benito García, Jaime
Fraile Prieto, Luis Mario
Sánchez-Tembleque Verbo, Victor
Vedia Fernández, María Victoria
author Benito García, Jaime
author_facet Benito García, Jaime
Fraile Prieto, Luis Mario
Sánchez-Tembleque Verbo, Victor
Vedia Fernández, María Victoria
author_role author
author2 Fraile Prieto, Luis Mario
Sánchez-Tembleque Verbo, Victor
Vedia Fernández, María Victoria
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 539.1
Lifetime measurements
Spectroscopy
Nuclei
Decay
Física nuclear
2207 Física Atómica y Nuclear
topic 539.1
Lifetime measurements
Spectroscopy
Nuclei
Decay
Física nuclear
2207 Física Atómica y Nuclear
description We report on the first measurement of the half-lives of K-pi = 11(-) and 12(+) four-quasiparticle states in the even-even nucleus W-178. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr3(Ce) scintillator detectors of the NuBall array at the ALTO facility in Orsay, France. The half-lives of these states only became experimentally accessible by the combination of several experimental techniques - scintillator fast timing, isomer spectroscopy with a pulsed beam, and the event-by-event calorimetry information provided by the NuBall array. The measured half-lives are 476(44)ps and 275(65)ps for the I-pi = 11(-) and 12(+) states, respectively. The decay transitions include weakly hindered E1 and E2 branches directly to the ground-state band, bypassing the two-quasiparticle states. This is the first such observation for an E1 transition. The interpretation of the small hindrance hinges on mixing between the ground-state band and the t-band. (C) 2019 The Author(s). Published by Elsevier B.V.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-02-10
2020
2020-02-10
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/20.500.14352/6191
url https://hdl.handle.net/20.500.14352/6191
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 Elsevier Science BV
publisher.none.fl_str_mv Elsevier Science BV
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 15,300724

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