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Precision mass measurements of $^{67}$Fe and $^{69,70}$Co : Nuclear structure toward N=40 and impact on r -process reaction rates

dc.contributor.authorCANETE, L.
hal.structure.identifierGrand Accélérateur National d'Ions Lourds [GANIL]
dc.contributor.authorGIRAUD, S.
dc.contributor.authorKANKAINEN, A.
hal.structure.identifierGrand Accélérateur National d'Ions Lourds [GANIL]
dc.contributor.authorBASTIN, B.
hal.structure.identifierInstitut Pluridisciplinaire Hubert Curien [IPHC]
dc.contributor.authorNOWACKI, F.
dc.contributor.authorPOVES, A.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorASCHER, P.
dc.contributor.authorERONEN, T.
hal.structure.identifierGrand Accélérateur National d'Ions Lourds [GANIL]
dc.contributor.authorALCINDOR, V.
dc.contributor.authorJOKINEN, A.
dc.contributor.authorKHANAM, A.
dc.contributor.authorMOORE, I.D.
dc.contributor.authorNESTERENKO, D.
hal.structure.identifierGrand Accélérateur National d'Ions Lourds [GANIL]
dc.contributor.authorDE OLIVEIRA SANTOS, Francois
dc.contributor.authorPENTTILÄ, H.
dc.contributor.authorPETRONE, C.
dc.contributor.authorPOHJALAINEN, I.
dc.contributor.authorDE ROUBIN, A.
dc.contributor.authorRUBCHENYA, V.
dc.contributor.authorVILEN, M.
dc.contributor.authorÄYSTÖ, J.
dc.date.issued2020
dc.identifier.issn2469-9985
dc.description.abstractEnAccurate mass measurements of neutron-rich iron and cobalt isotopes Fe67 and Co69,70 have been realized with the JYFLTRAP double Penning-trap mass spectrometer. With novel ion-manipulation techniques, the masses of the Co69,70 ground states and the 1/2− isomer in Co69 have been extracted for the first time. The measurements remove ambiguities in the previous mass values and yield a smoother trend on the mass surface, extending it beyond N=40. The moderate N=40 subshell gap has been found to weaken below Ni68, a region known for shape coexistence and increased collectivity. The excitation energy for the 1/2− intruder state in Co69 has been determined for the first time and is compared to large-scale shell-model calculations. The new mass values also reduce significantly mass-related uncertainties for the astrophysical rapid neutron-capture process calculations.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enNuclear Structure
dc.title.enPrecision mass measurements of $^{67}$Fe and $^{69,70}$Co : Nuclear structure toward N=40 and impact on r -process reaction rates
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevC.101.041304
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
bordeaux.journalPhysical Review C
bordeaux.page041304
bordeaux.volume101
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-03012793
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03012793v1
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