Quadrupole and octupole collectivity in the semi-magic nucleus Hg126
L. Morrison
(1)
,
K. Hadyńska-Klȩk
(2)
,
Zs. Podolyák
(1, 2)
,
L.P. Gaffney
(3, 4)
,
M. Zielińska
(5)
,
B.A. Brown
(6)
,
H. Grawe
(7)
,
P.D. Stevenson
(1)
,
T. Berry
(1)
,
A. Boukhari
(8)
,
M. Brunet
(1)
,
R. Canavan
(1)
,
R. Catherall
(4)
,
J. Cederkäll
(9)
,
S.J. Colosimo
(10)
,
J.G. Cubiss
(11)
,
H. de Witte
(12)
,
D.T. Doherty
(1)
,
Ch. Fransen
(13)
,
G. Georgiev
(8)
,
E. Giannopoulos
(14, 4)
,
M. Górska
(7)
,
H. Hess
(13)
,
L. Kaya
(13)
,
T. Kröll
(15)
,
N. Lalović
(9)
,
B. Marsh
(4)
,
Y. Martinez Palenzuela
(4, 12)
,
G. O'Neill
(16, 17)
,
J. Pakarinen
(14)
,
J.P. Ramos
(4)
,
P. Reiter
(13)
,
J.A. Rodriguez
(4)
,
D. Rosiak
(13)
,
S. Rothe
(4)
,
M. Rudigier
(1)
,
M. Siciliano
(5, 18)
,
E.C. Simpson
(19)
,
J. Snall
(4, 9)
,
P. Spagnoletti
(20)
,
S. Thiel
(13)
,
N. Warr
(13)
,
F. Wenander
(4)
,
R. Zidarova
(4)
1
UNIS -
University of Surrey
2 Heavy Ion Laboratory
3 Oliver Lodge Laboratory
4 CERN [Genève]
5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
6 Michigan State University [East Lansing]
7 GSI - GSI Helmholtzzentrum für Schwerionenforschung
8 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
9 Lund University
10 Aberdeen Royal Infirmary, Aberdeen
11 University of York [York, UK]
12 KU Leven
13 IKP - Institut für Kernphysik
14 JYU - University of Jyväskylä
15 TU Darmstadt - Technische Universität Darmstadt - Technical University of Darmstadt
16 UWC - University of the Western Cape
17 Helen Joseph Hospital Themba Lethu Clinic
18 INFN - Istituto Nazionale di Fisica Nucleare
19 ANU - Australian National University - Department of engineering
20 UWS - University of the West of Scotland
2 Heavy Ion Laboratory
3 Oliver Lodge Laboratory
4 CERN [Genève]
5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
6 Michigan State University [East Lansing]
7 GSI - GSI Helmholtzzentrum für Schwerionenforschung
8 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
9 Lund University
10 Aberdeen Royal Infirmary, Aberdeen
11 University of York [York, UK]
12 KU Leven
13 IKP - Institut für Kernphysik
14 JYU - University of Jyväskylä
15 TU Darmstadt - Technische Universität Darmstadt - Technical University of Darmstadt
16 UWC - University of the Western Cape
17 Helen Joseph Hospital Themba Lethu Clinic
18 INFN - Istituto Nazionale di Fisica Nucleare
19 ANU - Australian National University - Department of engineering
20 UWS - University of the West of Scotland
G. Georgiev
- Fonction : Auteur
- PersonId : 739360
- IdHAL : georgi-georgiev
- ORCID : 0000-0003-1467-1764
- IdRef : 16859188X
Résumé
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 W.u. was determined, the first such value for an 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 transition probability of 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.
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Licence : CC BY - Paternité
Licence : CC BY - Paternité