Measurement of the average number of prompt neutrons emitted per fission of /sup 235/U relative to /sup 252/Cf for the energy region 500 eV to 10 MeV
The average number of prompt neutrons emitted per fission ..nu../sub p/-bar(E), was measured for /sup 235/U relative to ..nu../sub p/-bar for the spontaneous fission of /sup 252/Cf over the neutron energy range from 500 eV to 10 MeV. The samples of /sup 235/U and /sup 252/Cf were contained in fission chambers located in the center of a large liquid scintillator. Fission neutrons were detected by the large liquid scintillator. The present values of ..nu../sub p/-bar(E) for /sup 235/U are about 0.8% larger than those measured by Boldeman. In earlier work with the present system, it was noted that Boldeman's value of ..nu../sub p/-bar(E) for thermal energy neutrons was about 0.8% lower than obtained at ORELA. It is suggested that the thickness of the fission foil used in Boldeman's experiment may cause some of the discrepancy between his and the present values of ..nu../sub p/-bar(E). For the energy region up to 700 keV, the present values of ..nu../sub p/-bar(E) for /sup 235/U agree, within the uncertainty, with those given in ENDF/B-V. Above 1 MeV the present results for ..nu../sub p/-bar(E) range about the ENDF/B-V values with differences up to 1.3%. 6 figures, 1 table.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5519909
- Report Number(s):
- ORNL/TM-7148; ENDF-289
- Country of Publication:
- United States
- Language:
- English
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Measurement of the average number of prompt neutrons emitted per fission of /sup 233/U relative to /sup 252/Cf for the energy region 500 eV to 10 MeV and below 0. 3 eV
Measurements of the energy dependence of prompt neutron emission from /sup 233/U, /sup 235/U, and /sup 239/Pu for E/sub n/ = 0. 0005 to 10 MeV relative to emission from spontaneous fission of /sup 252/Cf
Related Subjects
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
CORRECTIONS
DATA
DATA FORMS
ELEMENTARY PARTICLES
ENERGY RANGE
ERRORS
EV RANGE
EV RANGE 100-1000
EXPERIMENTAL DATA
FAST NEUTRONS
FERMIONS
FISSION
FISSION NEUTRONS
GRAPHS
HADRON REACTIONS
HADRONS
INFORMATION
INTERMEDIATE NEUTRONS
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
MEV RANGE
MEV RANGE 01-10
MULTIPLICITY
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
PROMPT NEUTRONS
TARGETS
URANIUM 235 TARGET