Distributions of fission products from various low-energy fission reactions and the systematics of the odd-even fluctuations

Journal Article · Wed Jun 01 04:00:00 EDT 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.15.2119· OSTI ID:7109496

Amiel, S; Feldstein, H; Izak-Biran, T

The dependence of the proton odd-even effect on the excitation energy of the fissioning nucleus and the mean kinetic energy of the fission fragments is examined in thermal neutron fission of /sup 239/Pu and in ''fast'' neutron fission of /sup 235/U, /sup 238/U, and /sup 232/Th. The proton odd-even effect observed in thermal neutron fission is found to decrease with increasing excitation energy and/or with increasing atomic number of the fissioning even-Z nucleus. Possible factors responsible for the magnitude of the odd-even effect are discussed. An evaluation is made of a neutron odd-even effect, based on the observed mean proton odd-even effect, and consequently the mass distribution of fission fragments prior to neutron emission is calculated. A good fit is found between the calculated and the measured fragment mass yield curves and between calculated and measured neutron emission as a function of mass.

• Research Organization: Nuclear Chemistry Department, Soreq Nuclear Research Centre, Yavne, Israel
• OSTI ID: 7109496
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

652016 -- Nuclear Properties & Reactions
A=220 & above
Theoretical-- Spontaneous & Induced Fission-- (-1987)
652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOMIC NUMBER
BARYON REACTIONS
EMISSION
ENERGY
ENERGY DEPENDENCE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FISSION
FISSION FRAGMENTS
HADRON REACTIONS
KINETIC ENERGY
KINETICS
MASS SPECTRA
NEUTRON EMISSION
NEUTRON REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTION KINETICS
NUCLEAR REACTION KINETICS FAST FISSION
NUCLEAR REACTIONS
NUCLEON REACTIONS
PLUTONIUM 239 TARGET
REACTION KINETICS
SPECTRA
TARGETS
THORIUM 232 TARGET
URANIUM 235 TARGET
URANIUM 238 TARGET