B(E2) upward arrow measurements for radioactive neutron-rich ge isotopes: reaching the N=50 closed shell.
The B(E2;0(+)(1)-->2(+)(1)) values for the radioactive neutron-rich germanium isotopes (78,80)Ge and the closed neutron shell nucleus 82Ge were measured at the HRIBF using Coulomb excitation in inverse kinematics. These data allow a study of the systematic trend between the subshell closures at N=40 and 50. The B(E2) behavior approaching N=50 is similar to the trend observed for heavier isotopic chains. A comparison of the experimental results with a shell model calculation demonstrates persistence of the N=50 shell gap and a strong sensitivity of the B(E2) values to the effective interaction.
Padilla-Rodal
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Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Galindo-Uribarri
A
A
Baktash
C
C
Batchelder
J C
JC
Beene
J R
JR
Bijker
R
R
Brown
B A
BA
Castaños
O
O
Fuentes
B
B
del Campo
J Gomez
JG
Hausladen
P A
PA
Larochelle
Y
Y
Lisetskiy
A F
AF
Mueller
P E
PE
Radford
D C
DC
Stracener
D W
DW
Urrego
J P
JP
Varner
R L
RL
Yu
C-H
CH