SOME EXPERIMENTAL DETERMINATIONS OF THE NUMBER OF PROMPT NEUTRONS FROM FISSION

Journal Article · Sun Oct 01 00:00:00 EDT 1961 · J. Nuclear Energy, Pts. A & B. Reactor Sci. and Technol.

DOI:https://doi.org/10.1016/0368-3230(61)90046-5· OSTI ID:4829276

Moat, A; Mather, D S; McTaggart, M H

The average number of neutrons per fission ( nu -bar) is measured for the spontaneous fission of Cf/sup 252/. A large liquid scintillation counter is then used to compare other nu -bar values with that of Cf/sup 252/. Some results obtained for prompt neutrons from spontaneous fission (SF) and neutron induced fission (NIF) are: U/sup 235/ NIF at 75 kev, nu -bar = 2.39 plus or minus 0.05; U/sup 235/ NIF at 2.5 Mev, 2.60 plus or minus 0.08; U/sup 235/ NIF at 14.2 Miev, 4.28 plus or minus 0.08; U/sup 238/ NIF at 14.2 Mev, 4.44 plus or minus 0.12; Pu/sup 240/ SF, 2.13 plus or minus 0.05; Cf/sup 252/SF, 3-69 plus or minus 0.07. The results are based on the assumption that the Pu/sup 240/ and Cf/sup 252/ fission neutron spectra are identical; the dependence of the results on these spectra is discussed. (auth)

• Research Organization: Atomic Weapons Research Establishment, Aldermaston, Berks, Eng.
• NSA Number: NSA-16-002529
• OSTI ID: 4829276
• Journal Information: J. Nuclear Energy, Pts. A & B. Reactor Sci. and Technol., Journal Name: J. Nuclear Energy, Pts. A & B. Reactor Sci. and Technol. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CALIFORNIUM 252
FISSION
MEASURED VALUES
NEUTRONS
PHYSICS
PLUTONIUM 240
SCINTILLATION COUNTERS
SPECTRA
URANIUM 235
URANIUM 238