Evidence for γ vibrations and shape evolutions through the transitional Hg184,186,188,190 nuclei

J. P. Delaroche, M. Girod, G. Bastin, I. Deloncle, F. Hannachi, J. Libert, M. G. Porquet, C. Bourgeois, D. Hojman, P. Kilcher, A. Korichi, F. Le Blanc, N. Perrin, B. Roussière, J. Sauvage, and H. Sergolle
Phys. Rev. C 50, 2332 – Published 1 November 1994
PDFExport Citation

Abstract

Constrained Hartree-Fock-Bogoliubov calculations based on Gogny’s force have been performed to determine the potential energy surfaces, collective masses, and moments of inertia used to build a five-dimension collective Hamiltonian treating quadrupole motion in the Hg184,186,188,190 isotopes. Many collective states have been predicted at low excitation energy, some of them forming γ-vibrational bands. To expand experimental information on γ bands, high statistics measurements on the β+ and electron capture decay of Tlg,190m and Tlg,186m have been performed at the ISOCELE facility. For the first time, γ bands have been identified in Hg190 and Hg186. These new results together with previous experimental information available on the ground state and K=0 excited bands in Hg184,186,188,190 form a database which has been analyzed and discussed in the present theoretical framework. It is argued that the first K=0 excited band in Hg190 is a β-vibrational band, and that Hg186 is a nucleus in which shape coexistence occurs not only for the K=0 bands but also for the γ bands.

  • Received 27 May 1994

DOI:https://doi.org/10.1103/PhysRevC.50.2332

©1994 American Physical Society

Authors & Affiliations

J. P. Delaroche and M. Girod

  • Commissariat à l’Energie Atomique, Service de Physique et Techniques Nucléaires, Boîte Postale 12, 91680 Bruyères-le-Châtel, France

G. Bastin, I. Deloncle, F. Hannachi, J. Libert, and M. G. Porquet

  • Institut National de Physique Nucléaire et de Physique des Particules, Centre National de la Recherche Scientifique, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, 91405 Orsay, France

C. Bourgeois, D. Hojman, P. Kilcher, A. Korichi, F. Le Blanc, N. Perrin, B. Roussière, J. Sauvage, and H. Sergolle

  • Institut National de Physique Nucléaire et de Physique des Particules, Centre National de la Recherche Scientifique, Institut de Physique Nucléaire, 91406 Orsay, France

References (Subscription Required)

Click to Expand
Issue

Vol. 50, Iss. 5 — November 1994

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
×