First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni

The excitation of the Pygmy Dipole Resonance (PDR) in the 68Ni nucleus, above the neutron emission threshold, via an isoscalar probe has been observed for the first time. The excitation has been produced in reactions where a 68Ni beam, obtained by the fragmentation of a 70Zn primary beam at INFN-LNS...

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Autores: Martorana, N. S., Cardella, G., Lanza, Edoardo G., Acosta, Luis, Andrés Martín, María Victoria, Auditore, L., Catara, Francesco, Filippo, E. de, Luca, S. de
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/75904
Acceso en línea:https://hdl.handle.net/11441/75904
https://doi.org/10.1016/j.physletb.2018.05.019
Access Level:acceso abierto
Palabra clave:Pygmy Dipole Resonance
Unstable nuclei
Isoscalar probe
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spelling First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68NiMartorana, N. S.Cardella, G.Lanza, Edoardo G.Acosta, LuisAndrés Martín, María VictoriaAuditore, L.Catara, FrancescoFilippo, E. deLuca, S. dePygmy Dipole ResonanceUnstable nucleiIsoscalar probeThe excitation of the Pygmy Dipole Resonance (PDR) in the 68Ni nucleus, above the neutron emission threshold, via an isoscalar probe has been observed for the first time. The excitation has been produced in reactions where a 68Ni beam, obtained by the fragmentation of a 70Zn primary beam at INFN-LNS, impinged on a 12C target. The γ-ray decay was detected using the CsI(Tl) detectors of the CHIMERA multidetector sphere. The 68Ni isotope as well as other heavy ion fragments were detected using the FARCOS array. The population of the PDR was evidenced by comparing the detected γ-ray energy spectra with statistical code calculations. The isotopic resolution of the detection system allows also to directly compare neutron decay channels with the 68Ni channel, better evidencing the PDR decay response function. This comparison allows also the extraction of the PDR cross section and the relative γ-ray angular distribution. The measured γ-ray angular distribution confirms the E1 character of the transition. The γ decay cross section for the excitation of the PDR was measured to be 0.32 mb with a 18% of statistical error.North-HollandFísica Atómica, Molecular y Nuclear2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/75904https://doi.org/10.1016/j.physletb.2018.05.019reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésPhysics Letters B, 782, 112-116.https://doi.org/10.1016/j.physletb.2018.05.019info:eu-repo/semantics/openAccessoai:idus.us.es:11441/759042026-06-17T12:51:07Z
dc.title.none.fl_str_mv First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
title First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
spellingShingle First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
Martorana, N. S.
Pygmy Dipole Resonance
Unstable nuclei
Isoscalar probe
title_short First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
title_full First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
title_fullStr First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
title_full_unstemmed First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
title_sort First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni
dc.creator.none.fl_str_mv Martorana, N. S.
Cardella, G.
Lanza, Edoardo G.
Acosta, Luis
Andrés Martín, María Victoria
Auditore, L.
Catara, Francesco
Filippo, E. de
Luca, S. de
author Martorana, N. S.
author_facet Martorana, N. S.
Cardella, G.
Lanza, Edoardo G.
Acosta, Luis
Andrés Martín, María Victoria
Auditore, L.
Catara, Francesco
Filippo, E. de
Luca, S. de
author_role author
author2 Cardella, G.
Lanza, Edoardo G.
Acosta, Luis
Andrés Martín, María Victoria
Auditore, L.
Catara, Francesco
Filippo, E. de
Luca, S. de
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Física Atómica, Molecular y Nuclear
dc.subject.none.fl_str_mv Pygmy Dipole Resonance
Unstable nuclei
Isoscalar probe
topic Pygmy Dipole Resonance
Unstable nuclei
Isoscalar probe
description The excitation of the Pygmy Dipole Resonance (PDR) in the 68Ni nucleus, above the neutron emission threshold, via an isoscalar probe has been observed for the first time. The excitation has been produced in reactions where a 68Ni beam, obtained by the fragmentation of a 70Zn primary beam at INFN-LNS, impinged on a 12C target. The γ-ray decay was detected using the CsI(Tl) detectors of the CHIMERA multidetector sphere. The 68Ni isotope as well as other heavy ion fragments were detected using the FARCOS array. The population of the PDR was evidenced by comparing the detected γ-ray energy spectra with statistical code calculations. The isotopic resolution of the detection system allows also to directly compare neutron decay channels with the 68Ni channel, better evidencing the PDR decay response function. This comparison allows also the extraction of the PDR cross section and the relative γ-ray angular distribution. The measured γ-ray angular distribution confirms the E1 character of the transition. The γ decay cross section for the excitation of the PDR was measured to be 0.32 mb with a 18% of statistical error.
publishDate 2018
dc.date.none.fl_str_mv 2018
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/11441/75904
https://doi.org/10.1016/j.physletb.2018.05.019
url https://hdl.handle.net/11441/75904
https://doi.org/10.1016/j.physletb.2018.05.019
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physics Letters B, 782, 112-116.
https://doi.org/10.1016/j.physletb.2018.05.019
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv North-Holland
publisher.none.fl_str_mv North-Holland
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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