Relative and Absolute Measurements of the Fast-Neutron Fission Cross Section of Uranium-235
- 1 April 1974
- journal article
- research article
- Published by Taylor & Francis in Nuclear Science and Engineering
- Vol. 53 (4), 370-392
- https://doi.org/10.13182/nse74-a23370
Abstract
Measurements of the dependence of the 235U fission cross section on neutron energy were carried out in the energy range from 35 keV to 3.5 MeV. Three different techniques were applied to monitor the neutron flux. The 6Li(n,α)T cross section was utilized in the lower energy range (<110 keV). The grey neutron detector was employed in the entire energy range, and the black neutron detector was used above 400 keV. The shapes were normalized with the results obtained from three different sets of absolute cross-section measurements. The associated activity technique was applied in the 450- to 650-keV range, the black neutron detector was used for absolute flux measurements at 800 keV and 3.5 MeV, and a calibrated vanadium bath was used at 500 keV. The results from the present measurements agree well with more recent data obtained by other experimenters but differ up to a factor of 2 from older values.Keywords
This publication has 24 references indexed in Scilit:
- La reaction 51V(p,n)51Cr comme source de neutrons monoenergetiquesNuclear Instruments and Methods, 1969
- Experimental determination of the efficiency of the grey neutron detectorNuclear Instruments and Methods, 1969
- A “grey” neutron detector for the intermediate energy regionNuclear Instruments and Methods, 1968
- The neutron capture cross section of gold in the keV energy regionJournal of Nuclear Energy, 1968
- A measurement of the 235U fission cross section at 30 AND 64 keVJournal of Nuclear Energy, 1967
- Measurements of the 235U neutron fission cross section in the energy range 0·04–14 MeVJournal of Nuclear Energy. Parts A/B. Reactor Science and Technology, 1965
- A remeasurement of the half-life of 235UJournal of Nuclear Energy. Parts A/B. Reactor Science and Technology, 1965
- Fission cross sections of 232Th, 233U, 235U, 237Np and 238U for 5–37 MeV neutronsJournal of Nuclear Energy. Parts A/B. Reactor Science and Technology, 1964
- Relative Yields of Neutron Groups from the ReactionsPhysical Review B, 1961
- Fission Cross Section ofU235for Fast NeutronsPhysical Review B, 1957