Abstract
J(pi) = 0(+) states have been investigated in the actinide nucleus
Pu-240 up to an excitation energy of 3 MeV with a high-resolution (p, t)
experiment at E-p = 24 MeV. To test the recently proposed J(pi) =
0(2)(+) double-octupole structure, the phenomenological approach of the
spdf-interacting boson model has been chosen. In addition, the total
0(+) strength distribution and the 0(+) strength fragmentation have been
compared to the model predictions as well as to the previously studied
(p, t) reactions in the actinides. The results suggest that the
structure of the 0(2)(+) states in the actinides might be more complex
than the usually discussed pairing isomers. Instead, the octupole degree
of freedom might contribute significantly. The signature of two
close-lying 0(+) states below the 2-quasiparticle energy is presented as
a possible manifestation of strong octupole correlations in the
structure of the 0(2)(+) states in the actinides.
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