Advanced

Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes : Coulomb excitation of 182Hg, 184Hg, 186Hg and 188Hg

Wrzosek-Lipska, K.; Rezynkina, K.; Bree, N.; Zielińska, M.; Gaffney, L. P.; Petts, A.; Andreyev, A.; Bastin, B.; Bender, M. and Blazhev, A., et al. (2019) In European Physical Journal A 55(8).
Abstract

The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of 01,2+, 21,2+ and 41+ states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate nuclear models. The experimental results are discussed in terms of mixing... (More)

The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of 01,2+, 21,2+ and 41+ states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate nuclear models. The experimental results are discussed in terms of mixing of two different configurations and are compared with three different model calculations: the Beyond Mean Field model, the Interacting Boson Model with configuration mixing and the General Bohr Hamiltonian. Partial agreement with experiment was observed, hinting to missing ingredients in the theoretical descriptions.

(Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal A
volume
55
issue
8
publisher
Springer
external identifiers
  • scopus:85071016875
ISSN
1434-6001
DOI
10.1140/epja/i2019-12815-2
language
English
LU publication?
yes
id
cc141899-5b77-48c8-8d17-c25a91823ed2
date added to LUP
2019-09-06 12:53:43
date last changed
2019-09-26 04:41:36
@article{cc141899-5b77-48c8-8d17-c25a91823ed2,
  abstract     = {<p>The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass <sup>182-188</sup> Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of 01,2+, 21,2+ and 41+ states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate nuclear models. The experimental results are discussed in terms of mixing of two different configurations and are compared with three different model calculations: the Beyond Mean Field model, the Interacting Boson Model with configuration mixing and the General Bohr Hamiltonian. Partial agreement with experiment was observed, hinting to missing ingredients in the theoretical descriptions.</p>},
  articleno    = {130},
  author       = {Wrzosek-Lipska, K. and Rezynkina, K. and Bree, N. and Zielińska, M. and Gaffney, L. P. and Petts, A. and Andreyev, A. and Bastin, B. and Bender, M. and Blazhev, A. and Bruyneel, B. and Butler, P. A. and Carpenter, M. P. and Cederkäll, J. and Clément, E. and Cocolios, T. E. and Deacon, A. N. and Diriken, J. and Ekström, A. and Fitzpatrick, C. and Fraile, L. M. and Fransen, Ch and Freeman, S. J. and García-Ramos, J. E. and Geibel, K. and Gernhäuser, R. and Grahn, T. and Guttormsen, M. and Hadinia, B. and Hadyńska-Klȩk, K. and Hass, M. and Heenen, P. H. and Herzberg, R. D. and Hess, H. and Heyde, K. and Huyse, M. and Ivanov, O. and Jenkins, D. G. and Julin, R. and Kesteloot, N. and Kröll, Th and Krücken, R. and Larsen, A. C. and Lutter, R. and Marley, P. and Napiorkowski, P. J. and Orlandi, R. and Page, R. D. and Pakarinen, J. and Patronis, N. and Peura, P. J. and Piselli, E. and Próchniak, L. and Rahkila, P. and Rapisarda, E. and Reiter, P. and Robinson, A. P. and Scheck, M. and Siem, S. and Singh Chakkal, K. and Smith, J. F. and Srebrny, J. and Stefanescu, I. and Tveten, G. M. and Van Duppen, P. and Van de Walle, J. and Voulot, D. and Warr, N. and Wiens, A. and Wood, J. L.},
  issn         = {1434-6001},
  language     = {eng},
  month        = {08},
  number       = {8},
  publisher    = {Springer},
  series       = {European Physical Journal A},
  title        = {Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes : Coulomb excitation of <sup>182</sup>Hg, <sup>184</sup>Hg, <sup>186</sup>Hg and <sup>188</sup>Hg},
  url          = {http://dx.doi.org/10.1140/epja/i2019-12815-2},
  volume       = {55},
  year         = {2019},
}