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Multi-quasiparticle sub-nanosecond isomers in <sup>178</sup>W

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dc.abstract.enWe report on the first measurement of the half-lives of K<sup>π</sup>=11<sup>-</sup> and 12<sup>-</sup> four-quasiparticle states in the even-even nucleus <sup>178</sup>W. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr<sub>3</sub> (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<sup>π</sup>=11<sup>-</sup> and 12<sup>-</sup> 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.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNita, C.R.
dc.contributor.authorJovancevic, N.
dc.contributor.authorCieplicka-Oryńczak, Natalia
dc.contributor.authorShearman, R.
dc.contributor.authorQi, L.
dc.contributor.authorOberstedt, S.
dc.contributor.authorSanchez-Tembleque, V.
dc.contributor.authorRegis, J.-M.
dc.contributor.authorFraile, L.M.
dc.contributor.authorLotay, G.
dc.contributor.authorKoseoglou, P.
dc.contributor.authorNakhostin, M.
dc.contributor.authorLorusso, G.
dc.contributor.authorJolie, J.
dc.contributor.authorHeine, M.
dc.contributor.authorKennington, A.
dc.contributor.authorKarayonchev, V.
dc.contributor.authorDoherty, D.T.
dc.contributor.authorCourtin, S.
dc.contributor.authorVedia, V.
dc.contributor.authorWitt, W.
dc.contributor.authorBenito, J.
dc.contributor.authorBlazhev, A.
dc.contributor.authorBrunet, M.
dc.contributor.authorBottoni, S.
dc.contributor.authorIskra, Łukasz
dc.contributor.authorZell, K.O.
dc.contributor.authorSoderstrom, P.-A.
dc.contributor.authorRegan, P.H.
dc.contributor.authorWilson, J.N.
dc.contributor.authorLebois, M.
dc.contributor.authorWalker, P.M.
dc.contributor.authorRudigier, M.
dc.contributor.authorPodolyak, Zs.
dc.contributor.authorCanavan, R.L.
dc.contributor.authorHadyńska-Klęk, Katarzyna
dc.date.accessioned2024-01-25T13:17:26Z
dc.date.available2024-01-25T13:17:26Z
dc.date.copyright2019-12-11
dc.date.issued2020
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionFINAL_PUBLISHED
dc.description.volume801
dc.identifier.doi10.1016/J.PHYSLETB.2019.135140
dc.identifier.issn0370-2693
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/113131
dc.identifier.weblinkhttps://www.sciencedirect.com/science/article/pii/S0370269319308627?via%3Dihub#!
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.relation.pages135140
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enLIFETIME MEASUREMENTS
dc.subject.enSPECTROSCOPY
dc.subject.enNUCLEI
dc.subject.enDECAY
dc.titleMulti-quasiparticle sub-nanosecond isomers in <sup>178</sup>W
dc.typeJournalArticle
dspace.entity.typePublication