1. Shape coexistence in Hg-178
- Author
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Joonas Konki, K. O. Zell, G. Fruet, Andrej Herzan, D. M. Cullen, A. Goldkuhle, Juha Sorri, Sanna Stolze, Janne Pakarinen, Mikael Sandzelius, A. Dewald, Jan Sarén, M. G. Procter, Michael Taylor, D. G. Jenkins, Sakari Juutinen, H. Badran, Matti Leino, Pauli Peura, Rauno Julin, C. Fransen, Paul Greenlees, Tuomas Grahn, K. Nomura, Catherine Scholey, M. Beckers, J. Litzinger, Ulrika Jakobsson, Panu Rahkila, Juha Uusitalo, Thomas Braunroth, J. Jolie, A. Blazhev, P. Ruotsalainen, C. Müller-Gatermann, Kalle Auranen, Department of Chemistry, and Helsinki Institute of Physics
- Subjects
Physics ,GE ,Manchester Cancer Research Centre ,010308 nuclear & particles physics ,Yrast ,ResearchInstitutes_Networks_Beacons/mcrc ,Nuclear structure ,Prolate spheroid ,Nuclear Structure ,01 natural sciences ,114 Physical sciences ,LIFETIMES ,PLUNGER ,Recoil ,STATES ,Excited state ,Neutron number ,0103 physical sciences ,MERCURY ,Atomic physics ,010306 general physics ,Nuclear Experiment ,Beam energy - Abstract
Lifetime measurements of excited states in Hg-178 have been performed using the Rh-103(Kr-78, p2n) reaction at a beam energy of 354 MeV. The recoil-decay tagging (RDT) technique was applied to select the Hg-178 nuclei and associate the prompt gamma rays with the correlated characteristic ground-state alpha decay. Lifetimes of the four lowest yrast states of Hg-178 have been determined using the recoil distance Doppler-shift (RDDS) method. The experimental data are compared to theoretical predictions with focus on shape coexistence. The results confirm the shift of the deformed prolate structures to higher lying states but also indicate their increasing deformation with decreasing neutron number.
- Published
- 2019