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

Journal Article · Sat Oct 31 23:00:00 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), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 97:3; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

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