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Identification of Jπ = 19/2⁺ and 23/2⁺ isomeric states in ¹²⁷Sb

Watanabe, H.; Lane, G. J.; Dracoulis, G. D.; Byrne, A. P.; Nieminen, P.; Kondev, F. G.; Ogawa, K.; Carpenter, M. P.; Janssens, R. V. F.; Lauritsen, T.; Seweryniak, D.; Zhu, S.; Chowdhury, P.

Description

The nucleus ¹²⁷Sb, which is on the neutron-rich periphery of the β-stability region, has been populated in complex nuclear reactions involving deep-inelastic and fusion-fission processes with ¹³⁶Xe beams incident on thick targets. The previously known isomer at 2325 keV in ¹²⁷Sb has been assigned spin and parity 23/2⁺, based on the measured γ-γ angular correlations and total internal conversion coefficients. The half-life has been determined to be 234(12) ns, somewhat longer than the value...[Show more]

dc.contributor.authorWatanabe, H.
dc.contributor.authorLane, G. J.
dc.contributor.authorDracoulis, G. D.
dc.contributor.authorByrne, A. P.
dc.contributor.authorNieminen, P.
dc.contributor.authorKondev, F. G.
dc.contributor.authorOgawa, K.
dc.contributor.authorCarpenter, M. P.
dc.contributor.authorJanssens, R. V. F.
dc.contributor.authorLauritsen, T.
dc.contributor.authorSeweryniak, D.
dc.contributor.authorZhu, S.
dc.contributor.authorChowdhury, P.
dc.date.accessioned2016-04-15T02:14:56Z
dc.date.available2016-04-15T02:14:56Z
dc.identifier.issn1434-6001
dc.identifier.urihttp://hdl.handle.net/1885/101035
dc.description.abstractThe nucleus ¹²⁷Sb, which is on the neutron-rich periphery of the β-stability region, has been populated in complex nuclear reactions involving deep-inelastic and fusion-fission processes with ¹³⁶Xe beams incident on thick targets. The previously known isomer at 2325 keV in ¹²⁷Sb has been assigned spin and parity 23/2⁺, based on the measured γ-γ angular correlations and total internal conversion coefficients. The half-life has been determined to be 234(12) ns, somewhat longer than the value reported previously. The 2194 keV state has been assigned Jπ = 19/2⁺ and identified as an isomer with T₁/₂ = 14(1) ns, decaying by two E2 branches. The observed level energies and transition strengths are compared with the predictions of a shell model calculation. Two 15/2⁺ states have been identified close in energy, and their properties are discussed in terms of mixing between vibrational and three-quasiparticle configurations.
dc.description.sponsorshipThis work was supported by the ANSTO program for Access to Major Research Facilities, grant No. 02/03-H-05, the Australian Research Council Discovery projects DP0343027 and DP0345844, and the U.S. Department of Energy, Office of Nuclear Physics, under contract No. DE-AC02-06CH11257 and No. DE-FG02-94ER40848. P.N. acknowledges funding from the Academy of Finland (Grant 121110).
dc.publisherSpringer Verlag
dc.rights© Società Italiana di Fisica / Springer-Verlag 2009
dc.sourceThe European Physical Journal A
dc.subject21.10.Hw Spin, parity, and isobaric spin
dc.subject21.10.Tg Lifetimes, widths
dc.subject21.60.Cs Shell model
dc.subject27.60.+j 90 ≤ A ≤ 149
dc.titleIdentification of Jπ = 19/2⁺ and 23/2⁺ isomeric states in ¹²⁷Sb
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume42
dc.date.issued2009
local.identifier.absfor020202
local.identifier.ariespublicationu4155331xPUB331
local.publisher.urlhttp://link.springer.com/
local.type.statusPublished Version
local.contributor.affiliationWatanabe, H, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Nuclear Physics, The Australian National University
local.contributor.affiliationLane, Gregory, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Nuclear Physics, The Australian National University
local.contributor.affiliationDracoulis, George, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Nuclear Physics, The Australian National University
local.contributor.affiliationByrne, Aidan, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationNieminen, Paivi, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Nuclear Physics, The Australian National University
local.contributor.affiliationKondev, Filip G, Argonne National Laboratory, United States of America
local.contributor.affiliationOgawa, K., RIKEN Nishina Center, Japan
local.contributor.affiliationCarpenter, M P, Argonne National Laboratory, United States of America
local.contributor.affiliationJanssens, R V F, Argonne National Laboratory, United States of America
local.contributor.affiliationLauritsen, T, Argonne National Laboratory, United States of America
local.contributor.affiliationSeweryniak, D, Argonne National Laboratory, United States of America
local.contributor.affiliationZhu, S., Argonne National Laboratory, United States of America
local.contributor.affiliationChowdhury, P, University of Massachusetts, United States of America
dc.relationhttp://purl.org/au-research/grants/arc/DP0343027
dc.relationhttp://purl.org/au-research/grants/arc/DP0345844
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage163
local.bibliographicCitation.lastpage169
local.identifier.doi10.1140/epja/i2009-10881-7
dc.date.updated2016-06-14T08:59:08Z
local.identifier.scopusID2-s2.0-70449532347
local.identifier.thomsonID000271645100005
CollectionsANU Research Publications

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