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Symmetric and asymmetric modes of spontaneous fission of /sup 252/Cf

Journal Article · · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
OSTI ID:6729849
; ;
The distribution of the cumulative yields of the precursors of four iodine isotopes and /sup 135/Sb and /sup 143/Cs is found from the falloff in activity of delayed neutrons in spontaneous fission of /sup 252/Cf. It is shown that the length of the ..beta..-decay chain for heavy fragments is essentially no different from that for /sup 235/U. At the same time for light fragments the length of the ..beta..-decay chain of /sup 252/Cf is higher by 1.3 charge units than for /sup 235/U. Thus, the hypothesis of different lengths of the ..beta..-decay chains turns out to be unjustified. A correlation is observed between the low yield of fragments in symmetric and highly asymmetric fission, on the one hand, and the lengths of the ..beta..-decay chains and the number of neutrons emitted by the light and heavy fragments, on the other hand.
Research Organization:
Physics and Power-Engineering Institute, Obninsk
OSTI ID:
6729849
Journal Information:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 25:5; ISSN SJNCA
Country of Publication:
United States
Language:
English

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Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
ANTIMONY 135
ANTIMONY ISOTOPES
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
CESIUM 143
CESIUM ISOTOPES
DECAY
DELAYED NEUTRON PRECURSORS
EVEN-EVEN NUCLEI
FISSION
HEAVY NUCLEI
INTERACTIONS
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPES
LEPTONIC DECAY
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE DECAY
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPONTANEOUS FISSION
SYMMETRY
WEAK INTERACTIONS
WEAK PARTICLE DECAY
YEARS LIVING RADIOISOTOPES