Monte Carlo calculation of the deexcitation of fission fragments in the spontaneous fission of /sup 252/Cf

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.365· OSTI ID:5727053

Kildir, M; Aras, N K

The consequences of the evaporation of prompt neutrons and ..gamma.. rays from primary fission fragments in the spontaneous fission of /sup 252/Cf have been examined by a Monte Carlo method. A semiempirical mass equation and experimental values of total kinetic energies are used to obtain the sum of excitation energies of complementary fragments. The division of this energy between complementary fragments is determined by the two-spheroid model for the scission configuration. The prompt neutron multiplicity distribution gives a value of 3.68 for the average number of prompt neutrons in /sup 252/Cf (sf). Calculated values of the average number of prompt neutrons as a function of fragments mass are in good agreement with the experimental values. Calculated results for the charge dependence of total ..gamma..-ray energies show an odd-even effect, whereas no such effect is apparent in the charge dependence of the average number of neutrons. Mass and charge distributions of secondary fission fragments are also well reproduced in the calculations.

• Research Organization: Department of Chemistry, Middle East Technical University, Ankara, Turkey
• OSTI ID: 5727053
• Journal Information: Phys. Rev. C; (United States), Vol. 25:1
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALIFORNIUM 252
SPONTANEOUS FISSION
FISSION FRAGMENTS
DE-EXCITATION
CHARGE DISTRIBUTION
EVAPORATION MODEL
MASS SPECTRA
MONTE CARLO METHOD
MULTIPLICITY
PROMPT GAMMA RADIATION
PROMPT NEUTRONS
STATISTICAL MECHANICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYONS
CALIFORNIUM ISOTOPES
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FERMIONS
FISSION
FISSION NEUTRONS
GAMMA RADIATION
HADRONS
HEAVY NUCLEI
IONIZING RADIATIONS
ISOTOPES
MATHEMATICAL MODELS
MECHANICS
NEUTRONS
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
RADIATIONS
RADIOISOTOPES
SPECTRA
YEARS LIVING RADIOISOTOPES
652016* - Nuclear Properties & Reactions
A=220 & above
Theoretical- Spontaneous & Induced Fission- (-1987)