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Joakim

Joakim Cederkäll

Professor

Joakim

Interplay between single-particle and collective effects in the odd-A Cu isotopes beyond N=40

Author

  • I Stefanescu
  • G Georgiev
  • D L Balabanski
  • N Blasi
  • A Blazhev
  • N Bree
  • Joakim Cederkäll
  • T E Cocolios
  • T Davinson
  • J Diriken
  • J Eberth
  • Andreas Ekström
  • D Fedorov
  • V N Fedosseev
  • L M Fraile
  • S Franchoo
  • K Gladnishki
  • M Huyse
  • O Ivanov
  • V 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
  • G Rainovski
  • P Reiter
  • K Riisager
  • M Seliverstov
  • G Sletten
  • J Van de Walle
  • P Van Duppen
  • D Voulot
  • N Warr
  • F Wenander
  • K Wrzosek

Summary, in English

Collective properties of the low-lying levels in the odd-A Cu67-73 were investigated by Coulomb excitation with radioactive beams. The beams were produced at ISOLDE and postaccelerated by REX-ISOLDE up to 2.99 MeV/u. In Cu-67,Cu-69, low-lying 1/2(-), 5/2(-), and 7/2(-) states were populated. In Cu-71,Cu-73, besides the known transitions deexciting the single-particle-like 5/2(-) and core-coupled 7/2(-) levels, gamma rays of 454 and 135 keV, respectively, were observed for the first time. Based on a reanalysis of beta-decay work and comparison with the systematics, a spin 1/2(-) is suggested for these excited states. Three B(E2) values were determined in each of the four isotopes. The results indicate a significant change in the structure of the odd-A Cu isotopes beyond N=40 where single-particle-like and collective levels are suggested to coexist at very low excitation energies.

Department/s

  • Nuclear physics

Publishing year

2008

Language

English

Publication/Series

Physical Review Letters

Volume

100

Issue

11

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114