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Multi-quasiparticle states in 184 W via multi-nucleon transfer |
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| Authors: | C. Wheldon J. J. Valiente-Dobón P. H. Regan C. J. Pearson C. Y. Wu J. F. Smith A. O. Macchiavelli D. Cline R. S. Chakrawarthy R. Chapman M. Cromaz P. Fallon S. J. Freeman A. Görgen W. Gelletly A. Hayes H. Hua S. D. Langdown I. Y. Lee X. Liang Zs. Podolyák G. Sletten R. Teng D. Ward D. D. Warner A. D. Yamamoto |
| Affiliation: | (1) Department of Physics, University of Surrey, GU2 7XH Guildford, Surrey, UK;(2) Kernphysik II, Gesellschaft für Schwerionenforschung, Max-Planck-Straße 1, D-64291 Darmstadt, Germany;(3) Wright Nuclear Structure Laboratory, Yale University, CT 06520-8124 New Haven, USA;(4) Department of Physics, University of Rochester, New York, NY, USA;(5) Department of Physics and Astronomy, Schuster Laboratory, University of Manchester, M13 9PL Manchester, UK;(6) Lawrence Berkeley National Laboratory, CA, 94720 Berkeley, USA;(7) School of ICT, University of Paisley, PA1 2BE Paisley, UK;(8) The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17., 2100 Copenhagen, Denmark;(9) CCLRC Daresbury Laboratory, WA 4AD Warrington, UK |
| Abstract: | A multi-nucleon transfer reaction using an 850 MeV 136Xe beam incident on a 198Pt target was used to populate high-spin states in 184W, 14 nucleons from the target. A 4-quasiparticle isomer with  ns has been observed for the first time and its de-excitation through collective and intrinsic structures studied. The results are compared with predictions of blocked BCS Nilsson calculations. Observation of this metastable state completes the tungsten 4-quasiparticle isomer systematics from A = 176 to 186. Mapping out the most yrast 4-quasiparticle isomers in these even-even tungsten isotopes suggests the existence of a highly favoured state in 188W, within reach of current experimental set-ups.Received: 14 October 2003, Revised: 14 November 2003, Published online: 18 May 2004PACS: 21.10.Tg Lifetimes - 23.20.Lv  transitions and level energies - 27.70. + q  |
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