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γ -ray spectroscopy of low-lying excited states and shape competition in Os 194

Daniel, T, Kisyov, S, Regan, Patrick, Marginean, N, Podolyak, Zsolt, Marginean, R, Nomura, K, Rudigier, Matthias, Mihai, R, Werner, V , Carroll, RJ, Gurgi, Laila, Oprea, A, Berry, Thomas, Serban, A, Nita, CR, Sotty, C, Suvaila, R, Turturica, A, Costache, C, Stan, L, Olacel, A, Boromiza, M and Toma, S (2017) γ -ray spectroscopy of low-lying excited states and shape competition in Os 194 Physical Review C, 95 (2), 024328.

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Abstract

The properties of excited states in the neutron-rich nucleus 194Os have been investigated using the 192Os(18O,16O)194Os reaction with an 80 MeV beam provided by the IFIN-HH Laboratory, Bucharest. Discrete γ -ray decays from excited states have been measured using the hybrid HPGe-LaBr3(Ce) array RoSPHERE. The current work identifies a number of previously unreported low-lying nonyrast states in 194Os as well as the first measurement of the half-life of the yrast 2+ state of 302(50) ps. This is equivalent to a B(E2 : 2+ → 0+) = 45(16) W.u. and intrinsic quadrupole deformation of βeff = 0.14(1). The experimental results are compared with Hartree-Fock-Bogoliubov–interacting-boson-model calculations and are consistent with a reduction in a quadrupole collectivity in Os isotopes with increasing neutron number.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Daniel, TUNSPECIFIEDUNSPECIFIED
Kisyov, SUNSPECIFIEDUNSPECIFIED
Regan, PatrickP.Regan@surrey.ac.ukUNSPECIFIED
Marginean, NUNSPECIFIEDUNSPECIFIED
Podolyak, ZsoltZ.Podolyak@surrey.ac.ukUNSPECIFIED
Marginean, RUNSPECIFIEDUNSPECIFIED
Nomura, KUNSPECIFIEDUNSPECIFIED
Rudigier, Matthiasm.rudigier@surrey.ac.ukUNSPECIFIED
Mihai, RUNSPECIFIEDUNSPECIFIED
Werner, VUNSPECIFIEDUNSPECIFIED
Carroll, RJUNSPECIFIEDUNSPECIFIED
Gurgi, Lailal.a.gurgi@surrey.ac.ukUNSPECIFIED
Oprea, AUNSPECIFIEDUNSPECIFIED
Berry, Thomast.berry@surrey.ac.ukUNSPECIFIED
Serban, AUNSPECIFIEDUNSPECIFIED
Nita, CRUNSPECIFIEDUNSPECIFIED
Sotty, CUNSPECIFIEDUNSPECIFIED
Suvaila, RUNSPECIFIEDUNSPECIFIED
Turturica, AUNSPECIFIEDUNSPECIFIED
Costache, CUNSPECIFIEDUNSPECIFIED
Stan, LUNSPECIFIEDUNSPECIFIED
Olacel, AUNSPECIFIEDUNSPECIFIED
Boromiza, MUNSPECIFIEDUNSPECIFIED
Toma, SUNSPECIFIEDUNSPECIFIED
Date : 28 February 2017
Identification Number : 10.1103/PhysRevC.95.024328
Copyright Disclaimer : Copyright 2017 American Physical Society
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 03 Mar 2017 16:49
Last Modified : 31 Oct 2017 19:10
URI: http://epubs.surrey.ac.uk/id/eprint/813693

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