Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1998-03-26
Phys.Rev.C57:2321-2328,1998
Physics
Nuclear Physics
Nuclear Theory
10 pages, 12 figures
Scientific paper
10.1103/PhysRevC.57.2321
We study the binary cold fission of $^{252}$Cf in the frame of a cluster model where the fragments are born to their respective ground states and interact via a double-folded potential with deformation effects taken into account up to multipolarity $\lambda=4$. The preformation factors were neglected. In the case when the fragments are assumed to be spherical or with ground state quadrupole deformation, the $Q$-value principle dictates the occurence of a narrow region around the double magic $^{132}$Sn, like in the case of cluster radioactivity. When the hexadecupole deformation is turned on, an entire mass-region of cold fission in the range 138 - 156 for the heavy fragment arise, in agreement with the experimental observations. This fact suggests that in the above mentioned mass-region, contrary to the usual cluster radioactivity where the daughter nucleus is always a neutron/proton (or both) closed shell or nearly closed shell spherical nucleus, the clusterization mechanism seems to be strongly influenced by the hexadecupole deformations rather than the $Q$-value.
Carstoiu Florin
Florescu A.
Greiner Walter
Misicu Serban
Sandulescu Aurel
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