Coulomb Excitation of Neutron-Rich Zn Isotopes: First Observation of the 2[sub 1][sup +] State in [sup 80]Zn
Journal article, 2007
Neutron-rich, radioactive Zn isotopes were investigated at the Radioactive Ion Beam facility REX-ISOLDE (CERN) using low-energy Coulomb excitation. The energy of the 21+ state in 78Zn could be firmly established and for the first time the 2+-->01+ transition in 80Zn was observed at 1492(1) keV. B(E2,21+-->01+) values were extracted for 74,76,78,80Zn and compared to large scale shell model calculations. With only two protons outside the Z=28 proton core, 80Zn is the lightest N=50 isotone for which spectroscopic information has been obtained to date. Two sets of advanced shell model calculations reproduce the observed B(E2) systematics. The results for N=50 isotones indicate a good N=50 shell closure and a strong Z=28 proton core polarization. The new results serve as benchmarks to establish theoretical models, predicting the nuclear properties of the doubly magic nucleus 78Ni.
Author
J. Van de Walle
F. Aksouh
F. Ames
T. Behrens
V. Bildstein
A. Blazhev
J. Cederkall
E. Clement
T. E. Cocolios
T. Davinson
P. Delahaye
J. Eberth
A. Ekstrom
D. V. Fedorov
V. N. Fedosseev
L. M. Fraile
S. Franchoo
R. Gernhauser
G. Georgiev
D. Habs
K. Heyde
G. Huber
M. Huyse
F. Ibrahim
O. Ivanov
J. Iwanicki
J. Jolie
O. Kester
U. Koster
T. Kroll
R. Krucken
M. Lauer
A. F. Lisetskiy
R. Lutter
B. A. Marsh
P. Mayet
O. Niedermaier
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
M. Pantea
O. Perru
R. Raabe
P. Reiter
M. Sawicka
H. Scheit
G. Schrieder
D. Schwalm
M. D. Seliverstov
T. Sieber
G. Sletten
N. Smirnova
M. Stanoiu
I. Stefanescu
J.-C. Thomas
J. J. Valiente-Dobon
P. Van Duppen
D. Verney
D. Voulot
N. Warr
D. Weisshaar
Fredrik Wenander
B. H. Wolf
M. Zielinska
Physical Review Letters
Vol. 99 14 142501-
Subject Categories
Subatomic Physics