title: Coulomb excitation of 68,70Cu: first use of postaccelerated isomeric beams.
abstract: We report on the first low-energy Coulomb excitation measurements with radioactive Ipi=6- beams of odd-odd nuclei 68,70Cu. The beams were produced at ISOLDE, CERN and were post-accelerated by REX-ISOLDE to 2.83 MeV/nucleon. Gamma rays were detected with the MINIBALL spectrometer. The 6- beam was used to study the multiplet of states (3-, 4-, 5-, 6-) arising from the pi2p3/2 nu 1g9/2 configuration. The 4- state of the multiplet was populated via Coulomb excitation and the B(E2;6--->4-) value was determined in both nuclei. The results obtained illustrate the fragile stability of the Z=28 shell and N=40 subshell closures. A comparison with large-scale shell-model calculations using the 56Ni core shows the importance of the proton excitations across the Z=28 shell gap to the understanding of the nuclear structure in the neutron-rich nuclei with N approximately 40.
authors.affiliation: Instituut voor Kern- en Stralingsfysica, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
authors.forename: I
authors.initials: I
authors.lastname: Stefanescu
authors.forename: G
authors.initials: G
authors.lastname: Georgiev
authors.forename: F
authors.initials: F
authors.lastname: Ames
authors.forename: J
authors.initials: J
authors.lastname: Aystö
authors.forename: D L
authors.initials: DL
authors.lastname: Balabanski
authors.forename: G
authors.initials: G
authors.lastname: Bollen
authors.forename: P A
authors.initials: PA
authors.lastname: Butler
authors.forename: J
authors.initials: J
authors.lastname: Cederkäll
authors.forename: N
authors.initials: N
authors.lastname: Champault
authors.forename: T
authors.initials: T
authors.lastname: Davinson
authors.forename: A
authors.initials: A
authors.lastname: De Maesschalck
authors.forename: P
authors.initials: P
authors.lastname: Delahaye
authors.forename: J
authors.initials: J
authors.lastname: Eberth
authors.forename: D
authors.initials: D
authors.lastname: Fedorov
authors.forename: V N
authors.initials: VN
authors.lastname: Fedosseev
authors.forename: L M
authors.initials: LM
authors.lastname: Fraile
authors.forename: S
authors.initials: S
authors.lastname: Franchoo
authors.forename: K
authors.initials: K
authors.lastname: Gladnishki
authors.forename: D
authors.initials: D
authors.lastname: Habs
authors.forename: K
authors.initials: K
authors.lastname: Heyde
authors.forename: M
authors.initials: M
authors.lastname: Huyse
authors.forename: O
authors.initials: O
authors.lastname: Ivanov
authors.forename: J
authors.initials: J
authors.lastname: Iwanicki
authors.forename: J
authors.initials: J
authors.lastname: Jolie
authors.forename: B
authors.initials: B
authors.lastname: Jonson
authors.forename: Th
authors.initials: T
authors.lastname: Kröll
authors.forename: R
authors.initials: R
authors.lastname: Krücken
authors.forename: O
authors.initials: O
authors.lastname: Kester
authors.forename: U
authors.initials: U
authors.lastname: Köster
authors.forename: A
authors.initials: A
authors.lastname: Lagoyannis
authors.forename: L
authors.initials: L
authors.lastname: Liljeby
authors.forename: G
authors.initials: G
authors.lastname: Lo Bianco
authors.forename: B A
authors.initials: BA
authors.lastname: Marsh
authors.forename: O
authors.initials: O
authors.lastname: Niedermaier
authors.forename: T
authors.initials: T
authors.lastname: Nilsson
authors.forename: M
authors.initials: M
authors.lastname: Oinonen
authors.forename: G
authors.initials: G
authors.lastname: Pascovici
authors.forename: P
authors.initials: P
authors.lastname: Reiter
authors.forename: A
authors.initials: A
authors.lastname: Saltarelli
authors.forename: H
authors.initials: H
authors.lastname: Scheit
authors.forename: D
authors.initials: D
authors.lastname: Schwalm
authors.forename: T
authors.initials: T
authors.lastname: Sieber
authors.forename: N
authors.initials: N
authors.lastname: Smirnova
authors.forename: J
authors.initials: J
authors.lastname: Van De Walle
authors.forename: P
authors.initials: P
authors.lastname: Van Duppen
authors.forename: S
authors.initials: S
authors.lastname: Zemlyanoi
authors.forename: N
authors.initials: N
authors.lastname: Warr
authors.forename: D
authors.initials: D
authors.lastname: Weisshaar
authors.forename: F
authors.initials: F
authors.lastname: Wenander