Authors:
Y. KandaHigh Energy Accelerator Research Organization (KEK) Radiation Science Center Oho, Tsukuba, Ibaraki 305-0801 Japan

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Y. OkiHigh Energy Accelerator Research Organization (KEK) Radiation Science Center Oho, Tsukuba, Ibaraki 305-0801 Japan

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A. EndoJapan Atomic Energy Research Institute Department of Health Physics Tokai, Ibaraki 319-1195 Japan

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M. NumajiriHigh Energy Accelerator Research Organization (KEK) Radiation Science Center Oho, Tsukuba, Ibaraki 305-0801 Japan

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K. KondoHigh Energy Accelerator Research Organization (KEK) Radiation Science Center Oho, Tsukuba, Ibaraki 305-0801 Japan

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Abstract  

The irradiation of atmospheric air with high-energy protons has been performed at the 12 GeV proton synchrotron. The specific activity of 13N, one of the principal airborne radioactivities, was measured as a function of the irradiation time at a dose rate of about 6·1016 eV/g/s, and compared with the calculated values. The predominant chemical species of 13N produced were found to be 13N2and 13NO2. Their proportions were approximately 55% for 13N2 and 45% for13NO2, being almost independent of the irradiation time. Smaller quantities of 13NO and H13NO2 were also observed. Measurements of radiolytic products showed that ozone is a main product and that NO2predominates among the products of nitrogen compounds, including HNO2 and HNO3. The G-value for ozone formation in air was estimated from the experimental data as 6.4 molecules/100 eV.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)