Probing the collective degrees of freedom at the proton drip line in the extremely neutron deficient 172Hg

M. Sandzelius, B. Cederwall, E. Ganioǧlu, B. Hadinia, K. Andgren, T. Bäck, T. Grahn, P. T. Greenlees, U. Jakobsson, A. Johnson, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, A. Khaplanov, M. Leino, M. Nyman, P. Peura, P. Rahkila, J. SánreC. Scholey, J. Sorri, J. Uusitalo, R. Wyss

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Excited states in the extremely neutron-deficient isotope 172Hg have been established for the first time. The 96Ru( 78Kr,2n) reaction was employed to populate excited states in 172Hg with a cross section σ ≈ 15 nb. The highly selective Recoil-Decay Tagging (RDT) technique was used to obtain clean in-beam γ-ray spectra for 172Hg. The yrast ground-state band has tentatively been established up to I=6h̄. The data have been interpreted within the framework of total Routhian surface and quasiparticle random phase approximation calculations. In addition to the well-known features of shape coexistence previously observed in light Hg isotopes, the systematic trends in the energy of the yrast 2 + and 4 + states in the chain of Hg isotopes indicate a pronounced vibrational collectivity which is reduced in strength, but at the same time shows a higher degree of harmonicity, as the neutron number decreases below the neutron midshell.

Original languageEnglish
Title of host publication4th International Conference on Proton Emitting Nuclei and Related Topics, PROCON2011
Pages29-34
Number of pages6
DOIs
StatePublished - 2011
Externally publishedYes
Event4th International Conference on Proton Emitting Nuclei and Related Topics, PROCON2011 - Bordeaux, France
Duration: Jun 6 2011Jun 10 2011

Publication series

NameAIP Conference Proceedings
Volume1409
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Conference on Proton Emitting Nuclei and Related Topics, PROCON2011
Country/TerritoryFrance
CityBordeaux
Period06/6/1106/10/11

Keywords

  • Hg
  • JUROGAM and GREAT spectrometers
  • QRPA calculations
  • RITU gas-filled separator
  • TRS calculations

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