Ratio of the prompt fission neutron spectrum of /sup 239/Pu to that of /sup 235/U

Journal Article · Sun Nov 01 00:00:00 EST 1987 · Nucl. Sci. Eng.; (United States)

OSTI ID:7064274

Sugimoto, M; Smith, A B; Guenther, P T

The prompt fission neutron spectrum resulting from /sup 239/Pu fission induced by --0.55-MeV incident neutrons is measured from 1.0 to 10.0 MeV relative to that of /sup 235/U fission induced by the same incident energy neutrons. The measurements employ the time-of-flight technique. Energy-dependent ratios of the two spectra are deduced from the measured values. The experimentally derived ratio results are compared with those calculated from ENDF/B-V (revision 2) and with results of recent microscopic measurements. Using the ENDF/B-V /sup 235/U Watt parameters for the /sup 235/U spectrum, the experimental measurements imply a ratio of average fission spectrum energies of /sup 239/Pu//sup 235/U = 1.045 +- 0.003, compared to the value 1.046 calculated from ENDF/B-V (revision 2).

• Research Organization: Japan Atomic Energy Research Institute, Tokai, Ibaraki (JP)
• OSTI ID: 7064274
• Journal Information: Nucl. Sci. Eng.; (United States), Vol. 97:3
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
PLUTONIUM 239
NEUTRON SPECTRA
URANIUM 235
CALCULATION METHODS
COMPARATIVE EVALUATIONS
DATA ANALYSIS
ENERGY DEPENDENCE
EXPERIMENTAL DATA
FISSION NEUTRONS
FISSION RATIO
FISSION SPECTRA
PROMPT NEUTRONS
TIME-OF-FLIGHT METHOD
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYONS
DATA
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
FERMIONS
HADRONS
HEAVY NUCLEI
INFORMATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NEUTRONS
NUCLEI
NUCLEONS
NUMERICAL DATA
PLUTONIUM ISOTOPES
RADIOISOTOPES
SPECTRA
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
652020* - Nuclear Properties & Reactions
A=220 & above
Experimental
653006 - Nuclear Theory- Spontaneous & Induced Fission
990230 - Mathematics & Mathematical Models- (1987-1989)