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. Sánre
  • C. 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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