Ratio of aerosol and gases of radioactive chlorine and particle size distribution of aerosol formed by high-energy proton irradiation

Sumi Yokoyama, K. Sato, K. Manabe, H. Noguchi, H. Kaneko, Y. Oki, T. Iida, Su Tanaka

Research output: Contribution to journalArticle

Abstract

To estimate internal doses due to the inhalation of radionuclides produced by the nuclear spallation of the air nuclei in high-energy proton accelerator facilities, the physicochemical properties of radionuclides are very important. Thus, the ratio of aerosol and gases of 38Cl and 39Cl formed by irradiating argon gas-added air with a 48 MeV proton beam has been measured. Radionuclides of 38Cl and 39Cl exist as aerosol, acid gas and non-acid gas. The percentages of activity of 38Cl and 39Cl aerosols are about 80%. The number size distributions of non-radioactive aerosol were characterised by two peaks with diameters of 10-20 nm and larger than 20 nm. As a result predicted by a simple surface model, it was found that the activity size distribution of 38Cl aerosols can be regarded as that having a single peak at 120 nm.

Original languageEnglish
Pages (from-to)392-397
Number of pages6
JournalRadiation protection dosimetry
Volume127
Issue number1-4
DOIs
Publication statusPublished - 01-12-2007

Fingerprint

proton irradiation
Chlorine
Aerosols
particle size distribution
Particle Size
chlorine
Protons
aerosols
Gases
Radioisotopes
radioactive isotopes
gases
Air
energy
Argon
air
respiration
spallation
proton energy
proton beams

All Science Journal Classification (ASJC) codes

  • Radiological and Ultrasound Technology
  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Public Health, Environmental and Occupational Health

Cite this

Yokoyama, Sumi ; Sato, K. ; Manabe, K. ; Noguchi, H. ; Kaneko, H. ; Oki, Y. ; Iida, T. ; Tanaka, Su. / Ratio of aerosol and gases of radioactive chlorine and particle size distribution of aerosol formed by high-energy proton irradiation. In: Radiation protection dosimetry. 2007 ; Vol. 127, No. 1-4. pp. 392-397.
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Ratio of aerosol and gases of radioactive chlorine and particle size distribution of aerosol formed by high-energy proton irradiation. / Yokoyama, Sumi; Sato, K.; Manabe, K.; Noguchi, H.; Kaneko, H.; Oki, Y.; Iida, T.; Tanaka, Su.

In: Radiation protection dosimetry, Vol. 127, No. 1-4, 01.12.2007, p. 392-397.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ratio of aerosol and gases of radioactive chlorine and particle size distribution of aerosol formed by high-energy proton irradiation

AU - Yokoyama, Sumi

AU - Sato, K.

AU - Manabe, K.

AU - Noguchi, H.

AU - Kaneko, H.

AU - Oki, Y.

AU - Iida, T.

AU - Tanaka, Su

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AB - To estimate internal doses due to the inhalation of radionuclides produced by the nuclear spallation of the air nuclei in high-energy proton accelerator facilities, the physicochemical properties of radionuclides are very important. Thus, the ratio of aerosol and gases of 38Cl and 39Cl formed by irradiating argon gas-added air with a 48 MeV proton beam has been measured. Radionuclides of 38Cl and 39Cl exist as aerosol, acid gas and non-acid gas. The percentages of activity of 38Cl and 39Cl aerosols are about 80%. The number size distributions of non-radioactive aerosol were characterised by two peaks with diameters of 10-20 nm and larger than 20 nm. As a result predicted by a simple surface model, it was found that the activity size distribution of 38Cl aerosols can be regarded as that having a single peak at 120 nm.

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