Unusual isospin-breaking and isospin-mixing effects in the A=35 mirror nuclei.
Excited states have been studied in 35Ar following the 16O(24Mg,1alpha1n)35Ar fusion-evaporation reaction at 60 MeV using the Ge-detector array GASP. A comparison with the mirror nucleus 35Cl shows two remarkable features: (i) A surprisingly large energy difference for the 13/2(-) states, in which the hitherto overlooked electromagnetic spin-orbit term is shown to play a major role, and (ii) a very different decay pattern for the 7/2(-) states, which provides direct evidence of isospin mixing.
Ekman
J
J
Department of Physics, Lund University, S-22100 Lund, Sweden.
Rudolph
D
D
Fahlander
C
C
Zuker
A P
AP
Bentley
M A
MA
Lenzi
S M
SM
Andreoiu
C
C
Axiotis
M
M
de Angelis
G
G
Farnea
E
E
Gadea
A
A
Kröll
Th
T
Mărginean
N
N
Martinez
T
T
Mineva
M N
MN
Rossi-Alvarez
C
C
Ur
C A
CA