Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM

Detalhes bibliográficos
Autores: Escrig, S., Poves Paredes, Alfredo, Taprogge, Jan
Formato: artículo
Fecha de publicación:2021
País:España
Recursos:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/705433
Acesso em linha:http://hdl.handle.net/10486/705433
https://dx.doi.org/10.1103/PhysRevC.103.064328
Access Level:acceso abierto
Palavra-chave:Shell Model
Neutrons
Nucleons
Física
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spelling Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75Escrig, S.Poves Paredes, AlfredoTaprogge, JanShell ModelNeutronsNucleonsFísicaArtículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMBackground: The evolution of shell structure around doubly magic exotic nuclei is of great interest in nuclear physics and astrophysics. In the 'southwest' region of Ni78, the development of deformation might trigger a major shift in our understanding of explosive nucleosynthesis. To this end, new spectroscopic information on key close-lying nuclei is very valuable. Purpose: We intend to measure the isomeric and β decay of Co75, with one-proton and two-neutron holes relative to Ni78, to access new nuclear structure information in Co75 and its β-decay daughters Ni75 and Ni74. Methods: The nucleus Co75 is produced in relativistic in-flight fission reactions of U238 at the Radioactive Ion Beam Factory in the RIKEN Nishina Center. Its isomeric and β decay are studied exploiting the BigRIPS and EURICA setups. Results: We obtain partial β-decay spectra for Ni75 and Ni74, and report a new isomeric transition in Co75. The energy [Eγ = 1914(2)keV] and half-life [t1/2 = 13(6)μs] of the delayed γ ray lend support for the existence of a Jπ = (1/2-) isomeric state at 1914(2) keV. A comparison with PFSDG-U shell-model calculations provides a good account for the observed states in Ni75, but the first calculated 1/2- level in Co75, a prolate K = 1/2 state, is predicted about 1 MeV below the observed (1/2-) level. Conclusions: The spherical-like structure of the lowest-lying excited states in Ni75 is proved. In the case of Co75, the results suggest that the dominance of the spherical configurations over the deformed ones might be stronger than expected below Ni78. Further experimental efforts to discern the nature of the Jπ = (1/2-) isomer are necessaryAmerican Physical SocietyDepartamento de Física TeóricaFacultad de Ciencias20212021-06-28research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/705433https://dx.doi.org/10.1103/PhysRevC.103.064328reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7054332026-06-23T12:46:27Z
dc.title.none.fl_str_mv Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
title Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
spellingShingle Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
Escrig, S.
Shell Model
Neutrons
Nucleons
Física
title_short Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
title_full Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
title_fullStr Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
title_full_unstemmed Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
title_sort Persistence of the Z = 28 shell gap in A = 75 isobars: Identification of a possible (1/2-) μs isomer in Co75 and β decay to Ni75
dc.creator.none.fl_str_mv Escrig, S.
Poves Paredes, Alfredo
Taprogge, Jan
author Escrig, S.
author_facet Escrig, S.
Poves Paredes, Alfredo
Taprogge, Jan
author_role author
author2 Poves Paredes, Alfredo
Taprogge, Jan
author2_role author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Shell Model
Neutrons
Nucleons
Física
topic Shell Model
Neutrons
Nucleons
Física
description Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-06-28
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/705433
https://dx.doi.org/10.1103/PhysRevC.103.064328
url http://hdl.handle.net/10486/705433
https://dx.doi.org/10.1103/PhysRevC.103.064328
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
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
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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 reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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