Measurement of Activation Reaction Rate Distributions in a Lead Assembly Bombarded with 500-MeV Protons
| Autor: | Toshinobu Sasa, Shin-ichro Meigo, Hiroshi Takada, Hideshi Yasuda, Kazufumi Tsujimoto |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Nuclear reaction
Materials science 010308 nuclear & particles physics 0211 other engineering and technologies 02 engineering and technology Electron Threshold energy 01 natural sciences Nuclear physics Reaction rate Nuclear Energy and Engineering 0103 physical sciences Spallation Production (computer science) Neutron 021108 energy Nuclide |
| Zdroj: | Nuclear Science and Engineering. 135:23-32 |
| ISSN: | 1943-748X 0029-5639 |
| DOI: | 10.13182/nse00-a2121 |
| Popis: | Reaction rate distributions of various activation detectors such as the {sup nat}Ni(n,x){sup 58}Co, {sup 197}Au(n,2n){sup 196}Au, and {sup 197}Au(n,4n){sup 194}Au reactions were measured to study the production and the transport of spallation neutrons in a lead assembly bombarded with protons of 500 MeV. The measured data were analyzed with the nucleon-meson transport code NMTC/JAERI combined with the MCNP4A code using the nuclide production cross sections based on the JENDL Dosimetry File and those calculated with the ALICE-F code. It was found that the NMTC/JAERI-MCNP4A calculations agreed well with the experiments for the low-energy-threshold reaction of {sup nat}Ni(n,x){sup 58}Co. With the increase of threshold energy, however, the calculation underestimated the experiments, especially above 20 MeV. The reason for the disagreement can be attributed to the underestimation of the neutron yield in the tens of mega-electron-volt regions by the NMTC/JAERI code. |
| Databáze: | OpenAIRE |
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