Physics Letters B (Mar 2023)
Quadrupole and octupole collectivity in the semi-magic nucleus 80206Hg126
- L. Morrison,
- K. Hadyńska-Klȩk,
- Zs. Podolyák,
- L.P. Gaffney,
- M. Zielińska,
- B.A. Brown,
- H. Grawe,
- P.D. Stevenson,
- T. Berry,
- A. Boukhari,
- M. Brunet,
- R. Canavan,
- R. Catherall,
- J. Cederkäll,
- S.J. Colosimo,
- J.G. Cubiss,
- H. De Witte,
- D.T. Doherty,
- Ch. Fransen,
- G. Georgiev,
- E. Giannopoulos,
- M. Górska,
- H. Hess,
- L. Kaya,
- T. Kröll,
- N. Lalović,
- B. Marsh,
- Y. Martinez Palenzuela,
- G. O'Neill,
- J. Pakarinen,
- J.P. Ramos,
- P. Reiter,
- J.A. Rodriguez,
- D. Rosiak,
- S. Rothe,
- M. Rudigier,
- M. Siciliano,
- E.C. Simpson,
- J. Snall,
- P. Spagnoletti,
- S. Thiel,
- N. Warr,
- F. Wenander,
- R. Zidarova
Affiliations
- L. Morrison
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom; Corresponding author.
- K. Hadyńska-Klȩk
- Heavy Ion Laboratory, University of Warsaw, Ludwika Pasteura 5A, 02-093 Warszawa, Poland; Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- Zs. Podolyák
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- L.P. Gaffney
- Oliver Lodge Laboratory, University of Liverpool, Liverpool, L69 7ZE, United Kingdom; CERN, Physics Department, 1211 Geneva 23, Switzerland
- M. Zielińska
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- B.A. Brown
- Department of Physics and Astronomy, FRIB Laboratory, Michigan State University, East Lansing, MI 42284-1321, USA
- H. Grawe
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
- P.D. Stevenson
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- T. Berry
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- A. Boukhari
- CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, F-91405 Orsay, France
- M. Brunet
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- R. Canavan
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom; National Physical Laboratory, Hampton Rd., Teddington, TW11 0LW, United Kingdom
- R. Catherall
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- J. Cederkäll
- Physics Department, Lund University, Box 118, Lund SE-221 00, Sweden
- S.J. Colosimo
- National Health Service Grampian, Aberdeen Royal Infirmary, Aberdeen, AB25 2ZN, Scotland, United Kingdom; School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill Health Campus, Foresterhill Rd., Aberdeen, AB25 2ZN, Scotland, United Kingdom
- J.G. Cubiss
- Department of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom; CERN, Physics Department, 1211 Geneva 23, Switzerland
- H. De Witte
- KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium
- D.T. Doherty
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- Ch. Fransen
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- G. Georgiev
- IJCLab, Université Paris-Saclay, F-91405 Orsay, France; CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, F-91405 Orsay, France
- E. Giannopoulos
- Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), Jyväskylä, FI-40014, Finland; CERN, Physics Department, 1211 Geneva 23, Switzerland
- M. Górska
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
- H. Hess
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- L. Kaya
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- T. Kröll
- Technische Universität Darmstadt, Institut für Kernphysik, Schlossgartenstr. 9, 64289 Darmstadt, Germany
- N. Lalović
- Physics Department, Lund University, Box 118, Lund SE-221 00, Sweden
- B. Marsh
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- Y. Martinez Palenzuela
- CERN, Physics Department, 1211 Geneva 23, Switzerland; KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium
- G. O'Neill
- Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville, ZA-7535, South Africa; iThemba LABS, Old Faure Road, Faure, Cape Town, 7131, South Africa
- J. Pakarinen
- Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), Jyväskylä, FI-40014, Finland
- J.P. Ramos
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- P. Reiter
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- J.A. Rodriguez
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- D. Rosiak
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- S. Rothe
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- M. Rudigier
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- M. Siciliano
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; INFN Laboratori Nazionali di Legnaro, 35020 Legnaro (Pd), Italy
- E.C. Simpson
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra ACT 2601, Australia
- J. Snall
- CERN, Physics Department, 1211 Geneva 23, Switzerland; Physics Department, Lund University, Box 118, Lund SE-221 00, Sweden
- P. Spagnoletti
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- S. Thiel
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- N. Warr
- IKP Köln, Zülpicher Str. 77, 50937 Köln, Germany
- F. Wenander
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- R. Zidarova
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- Journal volume & issue
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Vol. 838
p. 137675
Abstract
The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus 206Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states in 206Hg were observed. From the data, a reduced transition strength B(E2;21+→01+)=4.4(6) W.u. was determined, the first such value for an N=126 nucleus south of 208Pb, which is found to be slightly lower than that predicted by shell-model calculations. In addition, a collective octupole state was identified at an excitation energy of 2705 keV, for which a reduced B(E3) transition probability of 30−13+10 W.u. was extracted. These results are crucial for understanding both quadrupole and octupole collectivity in the vicinity of the heaviest doubly-magic nucleus 208Pb, and for benchmarking a number of theoretical approaches in this key region. This is of particular importance given the paucity of data on transition strengths in this region, which could be used, in principle, to test calculations relevant to the astrophysical r-process.
