Measurements of the average number of prompt neutrons emitted per fission of /sup 239/Pu and /sup 235/U. [0. 005 eV to 10 MeV]
Measurements of the average number of prompt neutrons ..nu.. bar/sub p/(E) emitted in neutron-induced fission of /sup 235/U and /sup 239/Pu relative to ..nu.. bar/sub p/ for spontaneous fission of /sup 252/Cf were made over an incident neutron energy range from 0.005 eV to 10 MeV. The incident neutrons were generated in pulses at the Oak Ridge Electron Linear Accelerator, and their energies, defined by time-of-flight methods. The samples were contained in fission chambers located in a large liquid scintillator. Fissions in the samples were identified by the simultaneous detection of prompt fission gamma rays in the scintillator and a pulse from the fission chamber. Fission neutrons were identified by the detection of the prompt gamma-ray cascade resulting from neutron absorption in gadolinium loaded in the liquid scintillator. The value of ..nu.. bar/sub p/(E) for /sup 239/Pu at 0.0253 eV agrees with the value given in EDNF/B-IV, whereas the corresponding value for /sup 235/U is about 0.7% larger than that given in ENDF/B-IV. 4 figures, 4 tables.
- Research Organization:
- Oak Ridge National Lab., Tenn. (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7020385
- Report Number(s):
- ORNL/TM-6246; ENDF-264
- Country of Publication:
- United States
- Language:
- English
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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
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Related Subjects
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
COLD NEUTRONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EPITHERMAL NEUTRONS
EV RANGE
FAST NEUTRONS
FERMIONS
FISSION
FISSION NEUTRONS
HADRON REACTIONS
HADRONS
INTERMEDIATE NEUTRONS
KEV RANGE
MEV RANGE
MEV RANGE 01-10
MILLI EV RANGE
MULTIPLICITY
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PLUTONIUM 239 TARGET
PROMPT NEUTRONS
TARGETS
THERMAL NEUTRONS
URANIUM 235 TARGET