Prompt Fission Neutron Spectra and Fragment Characteristics for Spontaneous Fission of Even-Numbered Plutonium Isotopes
| Autor: | A. Ruben, H. Märten, D. Seeliger |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Physics
Nuclear reaction 010308 nuclear & particles physics Neutron emission Fission Astrophysics::High Energy Astrophysical Phenomena 0211 other engineering and technologies 02 engineering and technology 01 natural sciences Nuclear physics Nuclear Energy and Engineering Prompt neutron Plutonium-240 0103 physical sciences Plutonium-242 Neutron 021108 energy Nuclear Experiment Spontaneous fission |
| Zdroj: | Nuclear Science and Engineering. 109:120-127 |
| ISSN: | 1943-748X 0029-5639 |
| DOI: | 10.13182/nse91-a28511 |
| Popis: | This paper reports on a phenomenological scission point model including temperature-dependent shell effects that is used to solve the energy partition problem as a function of mass asymmetry (A{sub 1}/A{sub 2}) for plutonium fission. Relevant fragment data such as average excitation energy {bar E}*(A) and total kinetic energy {ovr TKE}(A{sub 1}/A{sub 2}) are used as the basis for applying a temperature distribution model based on the Modland-Nix theory that includes the full mass number dependence of spectra, a realistic temperature distribution of fragments, a modified center-of-mass (CMS) spectrum ansatz, CMS anisotropy of neutron emission, and competition of neutron and gamma-ray emission. The new model describes neutron multiplicity energy, and angular distribution of prompt fission neutrons. Calculated data for {sup 238}Pu, {sup 240}Pu, and {sup 242}Pu spontaneous fission are presented and discussed in comparison with experimental data. |
| Databáze: | OpenAIRE |
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