By the same authors

Shape coexistence in light krypton isotopes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Author(s)

  • E Clement
  • A Gorgen
  • E Bouchez
  • A Chatillon
  • W Korten
  • Y Le Coz
  • C Theisen
  • C Andreoiu
  • F Becker
  • B Blank
  • C Borcea
  • A Buta
  • P Butler
  • JM Casandjian
  • WN Catford
  • T Czosnyka
  • A Emsallem
  • G de France
  • J Genevey
  • J Gerl
  • F Hannachi
  • K Hauschild
  • RD Herzberg
  • A Hurstel
  • J Iwanicki
  • G Jones
  • M Lewitowicz
  • R Lucas
  • I. Matea
  • F Negoita
  • FD Santos
  • D Pantelica
  • J Pinston
  • P Rahkila
  • M Rejmund
  • G Sletten
  • M Stanoiu
  • C Timis
  • M Zielinska

Department/unit(s)

Publication details

Title of host publicationNuclei at the Limits
DatePublished - 2005
Pages55-61
Number of pages7
PublisherAMER INST PHYSICS
Place of PublicationMELVILLE
EditorsD Seweryniak, TL Khoo
Original languageEnglish
ISBN (Print)0-7354-0249-3

Publication series

NameAIP CONFERENCE PROCEEDINGS
PublisherAMER INST PHYSICS
Volume764
ISSN (Print)0094-243X

Abstract

Shape coexistence in the light krypton isotopes was studied in a series of experiments at GANIL using various experimental techniques. A new low-lying 0(+) state, a so-called shape isomer, was found in delayed conversion-electron spectroscopy after fragmentation reactions. The systematics of such low-lying 0(+) states suggests that the ground states of the isotopes Kr-78 and Kr-76 have prolate deformation, while states with prolate and oblate shape are practically degenerate and Strongly Mixed M Kr-74, and that the oblate configuration becomes the ground state in Kr-72. This scenario was tested in experiments performing low-energy Coulomb excitation of radioactive Kr-76 and Kr-74 beams from the SPIRAL facility. Both transitional and diagonal electromagnetic matrix elements were extracted from the observed gamma-ray yields. The results find the prolate shape for the ground-state bands in Kr-76 and Kr-74 and an oblate deformation for the excited 2(2)(+) State in Kr-74, confirming the proposed scenario of shape coexistence.

    Research areas

  • KR-74, NUCLEI, HIGH-SPIN

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