Yield Measurements for ^7Be and ^<10>Be Productions from ^<nat>Cu, ^<nat>Ag and ^<197>Au by Bremsstrahlung Irradiation at E_0=200 MeV(II. Radiochemistry)

概要

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The yields of ^7Be and ^<10>Be produced by bremsstrahlung having a maximum energy (E_0) of 200 MeV in ^<nat>Cu, ^<nat>Ag and ^<197>Au targets were investigated by the AMS technique at MALT of the University of Tokyo. It was found that the yields at E_0 = 200 MeV were much lower than those at E_0 ≧250 MeV, obtained in our previous work. A change in the yields of the fragmentation component in the target-mass dependence was observed at E_0=200 MeV when compared with those at E_0≧250 MeV. However, the ratios of the fragmentation yield of ^<10>Be to that of ^7Be remained unchanged throughout the concerned E_0.
東北大学の論文