Measurement of the average multiplicity prompt-fission-neutrons from [238]u(n,f) and [235]u(n,f) from 0.7 to 200 MeV.
- Thierry
- Matthew J.
- Ronald O.
- John M.
- Dimitri
Prompt-fission-neutron multiplicities were measured at a 'white' neutron source for the fission of {sup 238}U and {sup 235}U up to 200 MeV. The data are of great importance in the connection of accelerator-coupled nuclear reactor systems incinerating actinides, with uranium considered as a prototype actinide. We report that the fission induced by 200 MeV neutrons produces {approx}10 more prompt neutrons than the fission induced by reactor neutrons. In conclusion, new data on {bar {nu}}{sub p} are reported with errors {<=} 15%. {bar {nu}}{sub p} grows steadily in the fission of {sup 238,235}U induced by neutrons up to 200 MeV. At this energy, it exceeds by {approx}10 the number of neutrons from fission induced by reactor neutrons. Uranium 238 shows enhanced neutron emission compared to uranium 235 due to the higher mass and lower binding energy of the neutrons. In future experiments, we plan to investigate on a much broader range the energy and the angular distributions of the emitted neutrons to improve the precision of the data.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 977875
- Report Number(s):
- LA-UR-04-6797; TRN: US1003748
- Resource Relation:
- Conference: Submitted to: International Conference on Nuclear Data For Science and Technology, Santa Fe, NM, Sept. 27 - Oct. 1, 2004
- Country of Publication:
- United States
- Language:
- English
Similar Records
IAEA CIELO Evaluation of Neutron-induced Reactions on 235U and 238U Targets
THE MEAN NUMBERS OF PROMPT NEUTRONS PRODUCED IN PHOTOFISSION OF Th$sup 232$ AND U$sup 238$ BY THE $gamma$-RAYS FROM THE F$sup 19$(p,$alpha$$gamma$)O$sup 16$ REACTION