Role of the higher static deformations of fragments in the cold binary fission of 252Cf

  • We study the binary cold fission of 252Cf 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 occurrence of a narrow region around the double magic 132Sn, 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.

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Author:Aurel Săndulescu, Şerban Mișicu, Florin Cârstoiu, Adrian Florescu, Walter GreinerGND
Parent Title (German):Physical Review. C
Document Type:Article
Date of Publication (online):2006/07/14
Year of first Publication:1998
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/07/14
Page Number:8
First Page:2321
Last Page:2328
Source:Physical Review C 57(5), S. 2321-2328 (1998), ©1998 The American Physical Society,
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
PACS-Classification:20.00.00 NUCLEAR PHYSICS / 21.00.00 Nuclear structure (for nucleon structure, see 14.20.Dh Properties of protons and neutrons; 13.40.-f for electromagnetic processes and properties; 13.60.Hb for deep-inelastic structure functions) / 21.60.-n Nuclear structure models and methods / 21.60.Gx Cluster models
20.00.00 NUCLEAR PHYSICS / 23.00.00 Radioactive decay and in-beam spectroscopy / 23.70.+j Heavy-particle decay
20.00.00 NUCLEAR PHYSICS / 25.00.00 Nuclear reactions: specific reactions / 25.85.-w Fission reactions / 25.85.Ca Spontaneous fission
20.00.00 NUCLEAR PHYSICS / 27.00.00 Properties of specific nuclei listed by mass ranges (an additional heading must be chosen with these entries, where the given mass number limits are, to some degree, arbitrary) / 27.90.+b A (greater-than-or-equal-to) 220
Licence (German):License LogoDeutsches Urheberrecht