Half-life of the yrast 2+ state in 188W: Evolution of deformation and collectivity in neutron-rich tungsten isotopes

P. J.R. Mason, Zs Podolyák, N. Mǎrginean, P. H. Regan, P. D. Stevenson, V. Werner, T. Alexander, A. Algora, T. Alharbi, M. Bowry, R. Britton, A. M. Bruce, D. Bucurescu, M. Bunce, G. Cǎta-Danil, I. Cǎta-Danil, N. Cooper, D. Deleanu, D. Delion, D. FilipescuW. Gelletly, D. Ghiţǎ, I. Gheorghe, T. Glodariu, G. Ilie, D. Ivanova, S. Kisyov, S. Lalkovski, R. Lica, S. N. Liddick, R. Mǎrginean, C. Mihai, K. Mulholland, C. R. Nita, A. Negret, S. Pascu, S. Rice, O. J. Roberts, T. Sava, J. F. Smith, P. A. Söderström, L. Stroe, G. Suliman, R. Suvaila, S. Toma, C. Townsley, E. Wilson, R. T. Wood, M. Zhekova, C. Zhou

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Abstract

The half-life of the yrast Iπ=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 of t1/2=0.87(12) ns is equivalent to a reduced transition probability of B(E2;21+→01+)=85(12) W.u. for this transition. The B(E2;21+→01+) is compared to neighboring tungsten isotopes and nuclei in the Hf, Os, and Pt isotopic chains. Woods-Saxon potential energy surface (PES) calculations have been performed for nuclei in the tungsten isotopic chain and predict prolate deformed minima with rapidly increasing γ softness for 184-192W and an oblate minimum for 194W.

Original languageEnglish
Article number044301
JournalPhysical Review C - Nuclear Physics
Volume88
Issue number4
DOIs
Publication statusPublished - Oct 2 2013

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Mason, P. J. R., Podolyák, Z., Mǎrginean, 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., Cǎta-Danil, G., Cǎta-Danil, I., Cooper, N., Deleanu, D., Delion, D., ... Zhou, C. (2013). Half-life of the yrast 2+ state in 188W: Evolution of deformation and collectivity in neutron-rich tungsten isotopes. Physical Review C - Nuclear Physics, 88(4), [044301]. https://doi.org/10.1103/PhysRevC.88.044301