Anomalous isomeric decays in 174Lu as a probe of K mixing and interactions in deformed nuclei.
A K(pi)=13+, 280 ns four-quasiparticle isomer in the odd-odd nucleus 174Lu has been identified and characterized. The isomer decays to both K(pi)=7(+) and K(pi)=0(+) rotational bands obtained from the parallel and antiparallel coupling of the proton 7/2+[404] and neutron 7/2+[633] orbitals. K mixing caused by particle-rotation coupling explains the anomalously fast transition rates to the 7+ band but those to the 0+ band are caused by a chance degeneracy between the isomer and a collective state, allowing the mixing matrix element for a large K difference to be deduced.
Dracoulis
G D
GD
Department of Nuclear Physics, R.S. Phys. S.E., Australian National University, Canberra, A.C.T. 0200 Australia.
Kondev
F G
FG
Lane
G J
GJ
Byrne
A P
AP
McGoram
T R
TR
Kibédi
T
T
Ahmad
I
I
Carpenter
M P
MP
Janssens
R V F
RV
Lauritsen
T
T
Lister
C J
CJ
Seweryniak
D
D
Chowdhury
P
P
Tandel
S K
SK