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Report No.

Water radiolysis with high-energy ion beams

Yamashita, Shinichi; Katsumura, Yosuke; Maeyama, Takuya*; Lin, M.; Muroya, Yusa*; Murakami, Takeshi*; Meesungnoen, J.*; Jay-Gerin, J.-P.*

It is phenomenologically well known that heavy-ion beams, which are known to be typical high-LET radiations, give distinctive irradiation effects compared to more popular low-LET radiations such as electron beam and $$gamma$$-rays. Here, LET is abbreviation of linear energy transfer, defined as energy deposition from radiation to surrounding matter per unit length of its trajectory. Most of earlier studies focus lighter ions ($$^{1}$$H, etc.) of lower energies ($$<$$ 10 MeV/nucleon). Moreover, knowledge under neutral pH, which is close to human body, has not been accumulated well. In this study, it is purposed to investigate chemical change occurring in neutral aqueous solutions after irradiation of high-energy (10-500 MeV/nucleon) heavy ions ($$^{12}$$C, $$^{56}$$Fe, etc.). Especially, structure of heavy-ion track and radiation-chemical yields are discussed.



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