Structure of 240Pu: evidence for octupole phonon condensation?
The expanded level structure of 240Pu available from the present study highlights the role of strong octupole correlations in this nucleus. In addition to a delayed alignment in the yrast band, the observations include the presence of both I(+)-->(I-1)(-) and I(-)-->(I-1)(+)E1 transitions linking states of the yrast and negative-parity bands at high spin and the presence of an additional even-spin, positive-parity band deexciting exclusively to the negative-parity sequence. The observations appear to be consistent with expectations based on the recently proposed concept of octupole phonon condensation.
Wang
X
X
Argonne National Laboratory, Argonne, Illinois 60439, USA.
Janssens
R V F
RV
Carpenter
M P
MP
Zhu
S
S
Wiedenhöver
I
I
Garg
U
U
Frauendorf
S
S
Nakatsukasa
T
T
Ahmad
I
I
Bernstein
A
A
Diffenderfer
E
E
Freeman
S J
SJ
Greene
J P
JP
Khoo
T L
TL
Kondev
F G
FG
Larabee
A
A
Lauritsen
T
T
Lister
C J
CJ
Meredith
B
B
Seweryniak
D
D
Teal
C
C
Wilson
P
P