isomer-delayed gamma-ray spectroscopy of neutron-rich 166tb

;Gurgi L.A.;Regan P.H.;Söderström P.-A.;Watanabe H.;Walker P.M.;Podolyák Zs.;Nishimura S.;Berry T.A.;Doornenbal P.;Lorusso G.;Isobe T.;Baba H.;Xu Z.Y.;Sakurai H.;Sumikama T.;Catford W.N.;Bruce A.M.;Browne F.;Lane G.J.;Kondev F.G.;Odahara A.;Wu J.;Liu H.L.;Xu F.R.;Korkulu Z.;Lee P.;Liu J.J.;Phong V.H.;Yagi A.;Zhang G.X.;Alharbi T.;Carroll R.J.;Chae K.Y.;Dombradi Zs.;Estrade A.;Fukuda N.;Griffin C.;Ideguchi E.;Inabe N.;Kanaoka H.;Kojouharov I.;Kubo T.;Kubono S.;Kurz N.;Kuti I.;Lalkovski S.;Lee E.J.;Lee C.S.;Lotay G.;Moon C.B.;Nishizuka I.;Nita C.R.;Patel Z.;Roberts O.J.;Schaffner H.;Shand C.M.;Suzuki H.;Takeda H.;Terashima S.;Vajta Zs.;Kanaya S.;Valiente-Dobòn J.J.

doi:10.1051/epjconf/201714610009

isomer-delayed gamma-ray spectroscopy of neutron-rich 166tb

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ID: 194353

2017

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Abstract

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This short paper presents the identification of a metastable, isomeric-state decay in the neutron-rich odd-odd, prolate-deformed nucleus 166Tb. The nucleus of interest was formed using the in-flight fission of a 345 MeV per nucleon 238U primary beam at the RIBF facility, RIKEN, Japan. Gamma-ray transitions decaying from the observed isomeric states in 166Tb were identified using the EURICA gamma-ray spectrometer, positioned at the final focus of the BigRIPS fragments separator. The current work identifies a single discrete gamma-ray transition of energy 119 keV which de-excites an isomeric state in 166Tb with a measured half-life of 3.5(4) μs. The multipolarity assignment for this transition is an electric dipole and is made on the basis internal conversion and decay lifetime arguments. Possible two quasi-particle Nilsson configurations for the initial and final states which are linked by this transition in 166Tb are made on the basis of comparison with Blocked BCS Nilsson calculations, with the predicted ground state configuration for this nucleus arising from the coupling of the v(1-/2)[521] and π(3+/2) Nilsson orbitals.

Reference Key	l.a.2017epjisomer-delayed Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors	;Gurgi L.A.;Regan P.H.;Söderström P.-A.;Watanabe H.;Walker P.M.;Podolyák Zs.;Nishimura S.;Berry T.A.;Doornenbal P.;Lorusso G.;Isobe T.;Baba H.;Xu Z.Y.;Sakurai H.;Sumikama T.;Catford W.N.;Bruce A.M.;Browne F.;Lane G.J.;Kondev F.G.;Odahara A.;Wu J.;Liu H.L.;Xu F.R.;Korkulu Z.;Lee P.;Liu J.J.;Phong V.H.;Yagi A.;Zhang G.X.;Alharbi T.;Carroll R.J.;Chae K.Y.;Dombradi Zs.;Estrade A.;Fukuda N.;Griffin C.;Ideguchi E.;Inabe N.;Kanaoka H.;Kojouharov I.;Kubo T.;Kubono S.;Kurz N.;Kuti I.;Lalkovski S.;Lee E.J.;Lee C.S.;Lotay G.;Moon C.B.;Nishizuka I.;Nita C.R.;Patel Z.;Roberts O.J.;Schaffner H.;Shand C.M.;Suzuki H.;Takeda H.;Terashima S.;Vajta Zs.;Kanaya S.;Valiente-Dobòn J.J.
Journal	utilitas mathematica
Year	2017
DOI	10.1051/epjconf/201714610009 Searching for DOI...
URL	https://doi.org/10.1051/epjconf/201714610009 https://doi.org/10.1051/epjconf/201714610009
Keywords	physics

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