Radiolysis calculation and -ray irradiation experiment of aqueous solutions containing seawater components

Hata, Kuniki ; Hanawa, Satoshi ; Kasahara, Shigeki; Motooka, Takafumi; Tsukada, Takashi ; Muroya, Yusa*; Katsumura, Yosuke*

Hydrogen peroxide production of -ray irradiated artificial seawater and solutions containing each seawater component were measured. The concentration of hydrogen peroxide in each solution showed a similar trend to the results of radiolysis calculation. Hydrogen peroxide production of artificial seawater was quite similar to that of an aqueous solution, AQ1, which contains 2.9% sodium chloride, 82ppm sodium bromide and 193ppm sodium bicarbonate. Radiolysis calculation on AQ1 has shown that notable hydrogen production, which is also reported by some studies on seawater radiolysis. These results indicate that radiolysis of AQ1 is substituted for seawater radiolysis. Radiolysis calculation was also carried out to identify the seawater components which control the hydrogen peroxide production. It was found that the hydrogen peroxide production was determined by chemical reactions involving bromide ion and G values depending on the concentration of chloride ion.