Systematic Measurement of Lineal Energy Distributions for Proton, He and Si Ion Beams Over a Wide Energy Range Using a Wall-less Tissue Equivalent Proportional Counter
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概要
- 論文の詳細を見る
The frequency distributions of the lineal energy, y, of 160 MeV proton, 150 MeV/u helium, and 490 MeV/u silicon ion beams were measured using a wall-less tissue equivalent proportional counter (TEPC) with a site size of 0.72 μm. The measured frequency distributions of y as well as the dose-mean values, y¯D, agree with the corresponding data calculated using the microdosimetric function of the particle and heavy ion transport code system PHITS. The values of y¯D increase in the range of LET below ~10 keV μm–1 because of discrete energy deposition by delta rays, while the relation is reversed above ~10 keV μm–1 as the amount of energy escaping via delta rays increases. These results indicate that care should be taken with the difference between y¯D and LET when estimating the ionization density that usually relates to relative biological effectiveness (RBE) of energetic heavy ions.
- Journal of Radiation Research 編集委員会の論文
著者
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SATO Tatsuhiko
Japan Atomic Energy Agency
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Takahashi Fumiaki
Research Group For Radiation Protection Nuclear Science And Engineering Directorate Japan Atomic Ene
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TSUDA Shuichi
Research Group of Radiation Protection, Japan Atomic Energy Agency
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SATO Tatsuhiko
Research Group of Radiation Protection, Japan Atomic Energy Agency
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SATOH Daiki
Research Group of Radiation Protection, Japan Atomic Energy Agency
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SASAKI Shinichi
Radiation Science Center, High Energy Accelerator Research Organization
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NAMITO Yoshihito
Radiation Science Center, High Energy Accelerator Research Organization
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IWASE Hiroshi
Radiation Science Center, High Energy Accelerator Research Organization
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BAN Shuichi
Radiation Science Center, High Energy Accelerator Research Organization
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TAKADA Masashi
Dept. of Technical Support and Development Fundamental Technology Center, National Institute of Radiological Sciences
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Takada Masashi
Dept. Of Technical Support And Dev. Fundamental Technol. Center National Inst. Of Radiological Sciences
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TAKAHASHI Fumiaki
Research Group of Radiation Protection, Japan Atomic Energy Agency
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