Determination of the quantity of OH radicals in EB-irradiated humid gases using oxidation of CO

Hakoda, Teruyuki; Shimada, Akihiko; Matsumoto, Kanae*; Hirota, Koichi

The quantity of OH radicals, produced in humid N $_{2}$ under 1-MeV EB irradiation, was indirectly determined using an index of oxidation of CO to CO $_{2}$ , which has been used in atmospheric chemistry. The concentration of water vapor to fully react with the positive ions/excited species was examined under different initial concentrations of water vapor. The concentration of CO to scavenge completely the produced OH radicals was also measured under different initial CO concentrations. As a result, such concentrations of water vapor and CO were higher than 6,000 and 2,000 ppmv, respectively. The experiment using this condition of CO and water vapor demonstrated that the concentration of CO $_{2}$ , produced from reaction of CO with OH radicals, lineally increased with doses of 0-10 kGy and the G(OH) was estimated as 4.90.

Language	:	English
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Meeting title	:	2nd Asia-Pacific Symposium on Radiation Chemistry (APSRC 2008)
Held date	:	2008/08
Location (city)	:	Tokyo
Location (country)	:	Japan
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Keywords	:	no keyword
Research Facility	:	1号加速器
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Registration No. : BB20080669
JAEA Abstracts No. :
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