Airborne gaseous 13N species and noxious gases produced at the 12 GeV proton synchrotron

Y. Kanda; Y. Oki; A. Endo; M. Numajiri; K. Kondo

doi:10.1023/a:1006790309473

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 247: Issue 1

Airborne gaseous 13N species and noxious gases produced at the 12 GeV proton synchrotron

Authors:

Y. Kanda

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

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Y. Oki

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

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A. Endo

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

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M. Numajiri

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

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, and

K. Kondo

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

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Pages:: 25–31

Online Publication Date:: 29 Oct 2004

Publication Date:: 17 Jan 2001

Article Category:: Research Article

DOI:: https://doi.org/10.1023/a:1006790309473

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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 Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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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)