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Identification of the crossing point at $N=21$ between normal and intruder configurations

dc.contributor.authorLICĂ, R.
dc.contributor.authorROTARU, F.
dc.contributor.authorBORGE, M.J.G.
hal.structure.identifierGrand Accélérateur National d'Ions Lourds [GANIL]
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorGRÉVY, S.
dc.contributor.authorNEGOIŢĂ, F.
dc.contributor.authorPOVES, A.
hal.structure.identifierGrand Accélérateur National d'Ions Lourds [GANIL]
dc.contributor.authorSORLIN, O.
dc.contributor.authorANDREYEV, A.N.
dc.contributor.authorBORCEA, R.
dc.contributor.authorCOSTACHE, C.
dc.contributor.authorDE WITTE, H.
dc.contributor.authorFRAILE, L.M.
dc.contributor.authorGREENLEES, P.T.
dc.contributor.authorHUYSE, M.
dc.contributor.authorIONESCU, A.
dc.contributor.authorKISYOV, S.
dc.contributor.authorKONKI, J.
dc.contributor.authorLAZARUS, I.
dc.contributor.authorMADURGA, M.
dc.contributor.authorMĂRGINEAN, N.
dc.contributor.authorMĂRGINEAN, R.
dc.contributor.authorMIHAI, C.
dc.contributor.authorMIHAI, R.E.
dc.contributor.authorNEGRET, A.
dc.contributor.authorPAGE, R.D.
dc.contributor.authorPAKARINEN, J.
dc.contributor.authorPASCU, S.
dc.contributor.authorPUCKNELL, V.
dc.contributor.authorRAHKILA, P.
dc.contributor.authorRAPISARDA, E.
dc.contributor.authorŞERBAN, A.
dc.contributor.authorSOTTY, C.O.
dc.contributor.authorSTAN, L.
dc.contributor.authorSTĂNOIU, M.
dc.contributor.authorTENGBLAD, O.
dc.contributor.authorTURTURICĂ, A.
dc.contributor.authorVAN DUPPEN, P.
dc.contributor.authorWADSWORTH, R.
dc.contributor.authorWARR, N.
dc.date.issued2017
dc.description.abstractEnThe β− decay of Mg34 was used to study the Al34 nucleus through γ spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in Al34 having spin-parity assignments Jπ=4− dominated by the normal configuration π(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2. Their unknown ordering and relative energy have been the subject of debate for the placement of Al34 inside or outside the N=20 “island of inversion.” We report here that the 1+ intruder lies only 46.6 keV above the 4− ground state. In addition, a new half-life of T1/2=44.9(4)ms, that is twice as long as the previously measured 20(10) ms, has been determined for Mg34. Large-scale shell-model calculations with the recently developed sdpf-u-mix interaction are compared with the new data and used to interpret the mechanisms at play at the very border of the N=20 island of inversion.
dc.language.isoen
dc.title.enIdentification of the crossing point at $N=21$ between normal and intruder configurations
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevC.95.021301
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
bordeaux.journalPhys.Rev.C
bordeaux.page021301
bordeaux.volume95
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01554689
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01554689v1
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