• Rapid Communication

Shape isomerism and spectroscopy of Hg177

A. Melarangi, D. Appelbe, R. D. Page, H. J. Boardman, P. T. Greenlees, P. Jones, D. T. Joss, R. Julin, S. Juutinen, H. Kettunen, P. Kuusiniemi, M. Leino, M. H. Muikku, P. Nieminen, J. Pakarinen, P. Rahkila, and J. Simpson
Phys. Rev. C 68, 041301(R) – Published 3 October 2003

Abstract

High spin states in the Hg177 nucleus were populated by the Sm144(Ar36,3n)Hg177 reaction at a beam energy of 178MeV. The emitted prompt γ rays were detected with the Jurosphere γ-ray spectrometer, while the recoiling nuclei were identified using an active stopper at the focal plane of the gas-filled separator RITU. A quasi-rotational band that decays to an isomeric state with a half-life t12=1.50±0.15μs and its subsequent γ decay to the ground state of Hg177 have been observed for the first time. Based on the observed decays from this isomeric state, we suggest that the spin of the ground state of Hg177 is Jπ=72. In addition, a sequence of transitions that bypass this isomeric state has also been observed. Evidence for shape coexistence is presented. The properties of the observed states are discussed in terms of the systematics of the mercury nuclei in this transitional region.

  • Figure
  • Figure
  • Figure
  • Received 1 August 2003

DOI:https://doi.org/10.1103/PhysRevC.68.041301

©2003 American Physical Society

Authors & Affiliations

A. Melarangi1, D. Appelbe2,*, R. D. Page1, H. J. Boardman1, P. T. Greenlees3, P. Jones3, D. T. Joss2, R. Julin3, S. Juutinen3, H. Kettunen3, P. Kuusiniemi3, M. Leino3, M. H. Muikku2,†, P. Nieminen3, J. Pakarinen3, P. Rahkila2, and J. Simpson2

  • 1Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
  • 2CCLRC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, United Kingdom
  • 3Department of Physics, University of Jyväskylä, P.O. Box 35, SF-40351, Finland

  • *Corresponding author. Electronic address: D.Appelbe@dl.ac.uk
  • Present address: Radiation and Nuclear Safety Authority, P.O. Box 14, FIN-00881 Helsinki, Finland.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 68, Iss. 4 — October 2003

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×