An Absolute Measurement of the7Li(n,n′αt) Reaction Cross Section between 5 and 14 MeV by Tritium Assaying
- 1 March 1985
- journal article
- research article
- Published by Taylor & Francis in Nuclear Science and Engineering
- Vol. 89 (3) , 261-272
- https://doi.org/10.13182/nse85-a17547
Abstract
The tritium production cross section of 7Li was measured between 5 and 14 MeV by irradiating LiOH pellets with monoenergetic neutrons. The neutron fluence was determined using a calibrated NE-213 liquid scintillator and the tritium produced by β counting in a liquid scintillation spectrometer. The technique for determining the amount of tritium produced was confirmed by a measurement of the 6Li(n, t)α cross section at thermal energies using irradiations in the GLEEP reactor. The results for the 7Li(n,n′αt) cross section are ∼25% lower than the ENDF/B-IV values with a mean uncertainty of 6%. The results are close to a recent evaluation below 11 MeV, but are 23% lower at 14 MeV.Keywords
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