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Half-life of the yrast 2+ state in W-188: Evolution of deformation and collectivity in neutron-rich Tungsten Isotopes.

Mason, P J R*; Podolyak, Z*; Marginean, N*; Regan, P H; Stevenson, P D*; Werner, V*; Alexander, T*; Algora, A*; Alharbi, T*; Bowry, M*; Britton, R*; Bruce, A M*; Bucurescu, D*; Bunce, M*; Cata-Danil, G*; Cata-Danil, I*; Cooper, N*; Deleanu, D*; Delion, D*; Filipescu, D*; Gelletly, W*; Ghita, D*; Glodariu, T; Ilie, G*; Ivanova, D*; Kisyov, S*; Lalkovski, S*; Lica, R*; Liddick, S N*; Marginean, R*; Mihai, C*; Mulholland, K*; Nita, C R*; Negret, A*; Pascu, S*; Rice, S*; Roberts, O J*; Sava, T*; Smith, J F*; Soederdtroem, P A*; Stroe, L*; Suliman, G*; Toma, S*; Townsley, C*; Wilson, E*; Wood, R T*; Zhekova, M*; Zhou, C* (2013) Half-life of the yrast 2+ state in W-188: Evolution of deformation and collectivity in neutron-rich Tungsten Isotopes. Phys. Rev. C, 88 (4). 044301

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Abstract

The half-life of the yrast Ip=2+ state in the neutron-rich nucleus 188W has been measured using fast-timing techniques with the HPGe and LaBr3:Ce array at the National Institute of Physics and Nuclear Engineering, Bucharest. The resulting value iof the t1/2=0.87(12) ns is equivalent to a reduced transition probability of B(E2:2+ -> 0+)=0.85(12) Wu. The B(E2:2+->0+) is compared to neighboring tungsten isotopes and nuclei in the Hf, Os and Pt isotopic chains. Wood-Saxon potential energy surface calculations (PES) have been performed for nuclei in the tungsten isotopic chain and predict prolate deformed minima with rapidly increasing gamma softness for 184-192W and an oblate minimum for 194W.

Item Type: Article
Keywords: gamma ray spectroscopy, neutron-rich nuclei, nuclear structure physics, nuclear models
Subjects: Ionising Radiation
Ionising Radiation > Radioactivity
Identification number/DOI: 10.1103/PhysRevC.88.044301
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5992

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