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Evaluation on neutron multiplicity distributions of neutron-induced 235U fission
Kang Wu1, Dongying Huo1, Chao Han1
1School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China.
Abstract:
The prompt neutron multiplicity was calculated in the thermal and fast neutron induced fission of 235U using Monte Carlo simulation. A non-equitemperature model was introduced to optimize the excitation energy allocation between two fission fragments in thermal neutron-induced fission of 235U. It is expected that the excitation energy is mainly absorbed by the heavy fragments with the increasing of the incident neutrons energy. The calculated results of neutron multiplicity distributions, a typical saw-tooth distribution was obtained, which is in agreement with the experimental results for incident neutron energy from 0.5 MeV to 5.55 MeV. The non-equitemperature model is expected to understand the excitation energy distribution in the fission process.
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