THE VALUE OF $nu$ FOR FISSION SPECTRUM INDUCED AND SPONTANEOUS FISSION OF $sup 238$U

Journal Article · Wed Jun 01 04:00:00 EDT 1960 · J. Nuclear Energy, Pt. A. Reactor Sci.

DOI:https://doi.org/10.1016/0368-3265(60)90071-2· OSTI ID:4149354

Sher, R; Leroy, J

The effective value of nu for U/sup 238/ fission induced by a fission spectrum of fast neutrons was measured by the scattering technique and, much more accurately, by the coincidence technique. The result for the ratio of nu /sub 238// nu /sub 235/ (thermal) agreed with earlier values of comparable precision reported in the literature, and, when averaged with them, yielded a best value for this ratio of 1.160 plus or minus 0.020. If nu /sub 235/ (thermal) is 2.47 plus or minus 0.0), the best value of nu /sub 238/ (fission spectrum) is 2.86 plus or minus 0.05. A probable explanation was suggested for the apparently high value of nu /sub 238/ (3.5 plus or minus 0.2) reported in an earlier experiment. The value of nu /sub 238/ for spontaneous fission of U/sup 238/ was also obtained. The result 2.10 plus or minus 0.08 (based on nu /sub 235/ (thermal) = 2.47) agreed with earlier values in the literature derived from separate measurements of neutron emission and spontaneous fission rates in U/sup 238/. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-14-023587
• OSTI ID: 4149354
• Journal Information: J. Nuclear Energy, Pt. A. Reactor Sci., Journal Name: J. Nuclear Energy, Pt. A. Reactor Sci. Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COINCIDENCE METHODS
ERRORS
FAST NEUTRONS
FISSION
MEASURED VALUES
NEUTRON BEAMS
PERFORMANCE
PHYSICS
SCATTERING
SPECTRA
URANIUM 235
URANIUM 238