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Report No.
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Measurement of nuclide production cross sections with 0.4 GeV - 3.0 GeV proton beams at J-PARC

Matsuda, Hiroki  ; Meigo, Shinichiro   ; Iwamoto, Hiroki   ; Maekawa, Fujio  

For the improvement of nuclear design for Accelerator-Driven System (ADS), production cross section with higher accuracy is required. For data acquisition around 1 GeV energy range at J-PARC, protons having energy 0.8 and 3.0 GeV were irradiated on metal samples, which were sandwiched by several metal foils (0.1mm thickness). Analysis of the gold foils was started since there are many experimental data comparatively and is a monoisotopic element. Created activated nuclides were identified by germanium detectors. Finally, production cross sections were evaluated by irradiation parameters. They were compared with the evaluated data (JENDL-HE/2007) and the calculated one by PHITS code. It was found that the cross section of $$^{46}$$Sc agreed with JENDL-HE/2007 under 1.5 GeV region, it underestimated 50% above that region. The PHITS calculation underestimated drastically over whole energy range even though the GEM model which described an evaporation process were replaced by Furihata GEM model. For $$^{185}$$Os, namely spallation product, both the calculation and the evaluated data underestimated the data over the whole range. Thus, it was recommended that an intranuclear cascade model and an evaporation model implemented in PHITS should be modified.

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