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Two proton high-spin excitations and dipole bands in192Hg |
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| Authors: | Y Le Coz N Redon A Astier R Béraud R Duffait M Meyer F Hannachi G Bastin I Deloncle B Gall M Kaci M G Porquet C Schück F Azaiez C Bourgeois J Duprat A Korichi N Perrin N Poffé H Sergolle J F Sharpey-Schafer C W Beausang S J Gale M J Joyce E S Paul R M Clark K Hauschild R Wadsworth J Simpson M A Bentley A G Smith H Hübel P Willsau G De France I Ahmad M Carpenter R Henry R V F Janssens T L Khoo T Lauritsen |
| Institution: | 1. Institut de Physique Nucléaire de Lyon, IN2P3-CNRS, Université C. Bernard Lyon-1, F-69622, Villeurbanne Cedex, France 2. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, IN2P3-CNRS, Bat. 104-108, F-91405, Orsay Campus, France 3. Institut de Physique Nucléaire, IN2P3-CNRS, F-91406, Orsay Campus, France 4. CNRS Office, SW7 2JN, London, UK 5. Oliver Lodge Laboratory, University of Liverpool, P.O. Box 147, L69 3BX, Liverpool, UK 6. Department of Physics, University of York, Y01 5DD, Helsington, York, UK 7. SERC Daresbury Laboratory, WA4 4AD, Daresbury, Warrington, UK 8. School of Sciences, Staffordshire University, Stoke on Trent, ST4 2DE, UK 9. Schuster Laboratory, University of Manchester, M13 9PL, Manchester, UK 10. Institut für Strahlen- und Kernphysik, Universit?t Bonn, Nussallee 14-16, D-53115, Bonn, Germany 11. Centre de Recherches Nucléaires, IN2P3-CNRS, Université L. Pasteur, BP20, F-67037, Strasbourg, France 12. Argonne National Laboratory, 60439, Argonne, IL, USA |
| Abstract: | The192Hg nucleus was populated in the160Gd(36S, 4n) reaction at a beam energy of E=159 MeV. Emittedγ-rays were detected with the EUROGAM array comprising 43 Compton-suppressed large volume Ge detectors. The level scheme of192Hg has been extended up to an excitation energy of E=10.4 MeV and spin I=34 ?. Two new structures, made of competing ΔI=1 and ΔI=2 transitions have been observed and their connexions with the low-lying levels established. Their lowest levels are located at 6.304 MeV and 6.879 MeV excitation energy. The experimental results are compared with mean-field HF+BCS calculations. It is proposed that the new structures originate from deformation-aligned quasi-proton excitations π(i13/2 * h9/2)K=11 andπ (h9/2) K=8 2 , coupled to rotation-aligned quasi-neutron ν(i13/2)n and quasi-proton π(h11/2)2 excitations. |
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