Coulomb Excitation of 68,70Cu: First Use of Postaccelerated Isomeric Beams
Journal article, 2007
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 pi2p3/2nu1g9/2 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[approximate]40.
isomer Coulomb excitation REX-ISOLDE post-accelerator
Author
I. Stefanescu
G. Georgiev
F. Ames
J. Aysto
D. L. Balabanski
G. Bollen
P. A. Butler
J. Cederkall
N. Champault
T. Davinson
A. De Maesschalck
P. Delahaye
J. Eberth
D. Fedorov
V. N. Fedosseev
L. M. Fraile
S. Franchoo
K. Gladnishki
D. Habs
K. Heyde
M. Huyse
O. Ivanov
J. Iwanicki
J. Jolie
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
Th Kroll
R. Krucken
O. Kester
U. Koster
A. Lagoyannis
L. Liljeby
G. Lo Bianco
B. A. Marsh
O. Niedermaier
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
M. Oinonen
G. Pascovici
P. Reiter
A. Saltarelli
H. Scheit
D. Schwalm
T. Sieber
N. Smirnova
J. Van De Walle
P. Van Duppen
S. Zemlyanoi
N. Warr
D. Weisshaar
F. Wenander
Physical Review Letters
Vol. 98 12 122701-4
Subject Categories
Subatomic Physics
DOI
10.1103/PhysRevLett.98.122701