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Joakim

Joakim Cederkäll

Professor

Joakim

Coulomb excitation of Ga-73

Author

  • J. Diriken
  • I. Stefanescu
  • D. Balabanski
  • N. Blasi
  • A. Blazhev
  • N. Bree
  • Joakim Cederkäll
  • T. E. Cocolios
  • T. Davinson
  • J. Eberth
  • Andreas Ekström
  • D. V. Fedorov
  • V. N. Fedosseev
  • L. M. Fraile
  • S. Franchoo
  • G. Georgiev
  • K. Gladnishki
  • M. Huyse
  • O. V. Ivanov
  • V. S. Ivanov
  • J. Iwanicki
  • J. Jolie
  • T. Konstantinopoulos
  • Th. Kroell
  • R. Kruecken
  • U. Koester
  • A. Lagoyannis
  • G. Lo Bianco
  • P. Maierbeck
  • B. A. Marsh
  • P. Napiorkowski
  • N. Patronis
  • D. Pauwels
  • P. Reiter
  • M. Seliverstov
  • G. Sletten
  • J. Van de Walle
  • P. Van Duppen
  • D. Voulot
  • W. B. Walters
  • N. Warr
  • F. Wenander
  • K. Wrzosek

Summary, in English

The B(E2; I-i -> I-f) values for transitions in Ga-71(31)40 and Ga-73(31)42 were deduced from a Coulomb excitation experiment at the safe energy of 2.95 MeV/nucleon using post-accelerated beams of Ga-71,Ga-73 at the REX-ISOLDE on-line isotope mass separator facility. The emitted gamma rays were detected by the MINIBALL gamma-detector array, and B(E2; I-i -> I-f) values were obtained from the yields normalized to the known strength of the 2(+) -> 0(+) transition in the Sn-120 target. The comparison of these new results with the data of less neutron-rich gallium isotopes shows a shift of the E2 collectivity toward lower excitation energy when adding neutrons beyond N = 40. This supports conclusions from previous studies of the gallium isotopes, which indicated a structural change in this isotopic chain between N = 40 and 42. Combined with recent measurements from collinear laser spectroscopy showing a 1/2(-) spin and parity for the ground state, the extracted results revealed evidence for a 1/2(-), 3/2(-) doublet near the ground state in Ga-73(31)42 differing by at most 0.8 keV in energy.

Department/s

  • Nuclear physics

Publishing year

2010

Language

English

Publication/Series

Physical Review C (Nuclear Physics)

Volume

82

Issue

6

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0556-2813