Fission Neutron Multiplicity for the 242mAm(n,f) Reaction
- 1 April 1981
- journal article
- research article
- Published by Taylor & Francis in Nuclear Science and Engineering
- Vol. 77 (4) , 454-462
- https://doi.org/10.13182/NSE81-A18958
Abstract
The fission neutron multiplicity, ͞ν, of 242mAm(n,f) was measured relative to that of 235U(n,f) using the neutron time-of-flight facility at the Lawrence Livermore National Laboratory 100-MeV electron Linac. Incident neutron energies ranged from 0.037 to 30 MeV. Fission fragments were detected using two hemispherical ionization chambers each containing ∼400 µg of 99.2% pure 242mAm. A separate fission chamber with 8.3 mg of 235U was situated between the two 242Am chambers and provided a normalization at every data point. Fission neutrons were detected in a liquid benzene scintillator using pulse-shape discrimination to separate gamma rays from neutrons. A comparison of the measured energy dependence of ͞ν is made with semi-empirical models of neutron emission from the actinides.Keywords
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