Dosimetry for Neutrons from 0.25 to 15 MeV by the Measurement of Linear Energy Transfer Distributions for Secondary Charged Particles in CR-39 Plastic

スポンサーリンク

概要

• 論文の詳細を見る

• In the radiation fields of high energy accelerator facilities, high-altitude aircraft and space flights, high-energy neutron dosimetry of ${\sim}20$ MeV or more is a significant issue for radiological protection. We studied the feasibility of experimental measurements of linear energy transfer (LET) distributions for secondary charged particles induced by fast neutrons using CR-39 plastic nuclear track detectors. In order to investigate a method of analyzing the CR-39 detectors that is appropriate for fast neutron dosimetry, two-layer CR-39 stacks were exposed to monochromatic neutrons (0.25, 0.55, 5, and 15 MeV) at the Fast Neutron Laboratory of Tohoku University in Japan. We also conducted Monte Carlo calculations to estimate the detection efficiency of the CR-39 detector for recoil protons. The CR-39 detectors treated by single-step chemical etching were used to obtain LET distributions for $\mathrm{LET} > 10$ keV/μm-water. The results indicated that measurements of short-range particles are very important for obtaining the correct LET distributions. Using the measured LET distributions, we calculated neutron sensitivities, absorbed doses and dose equivalents based on the ICRP 60 $Q$–$L$ relation and averaged quality factors. The dose equivalents were compared with the neutron fluence-to-dose equivalent conversion factors given by ICRP 74 and the averaged quality factors were compared with weighting factors given by ICRP 60 and ICRP 92.

• 2008-03-25

著者

• Doke Tadayoshi

  Advanced Research Institute For Science And Engineering Of Waseda University

• SASAKI Shinichi

  Radiation Science Center, High Energy Accelerator Research Organization

• Nagamatsu Aiko

  Space Environment Utilization Center, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan

• Nagamatsu Aiko

  Space Environment Utilization Center, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki 305-8505, Japan

• Tawara Hiroko

  Radiation Science Center, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

• Kitajo Keiichi

  Space Station Engineering Department, Advanced Engineering Services Co., Ltd., 1-6-1 Takezono, Tsukuba, Ibaraki 305-0032, Japan

• Kumagai Hidenori

  Space Station Engineering Department, Advanced Engineering Services Co., Ltd., 1-6-1 Takezono, Tsukuba, Ibaraki 305-0032, Japan

• Kumagai Hidenori

  Space Station Engineering Department, Advanced Engineering Services Co., Ltd., Tsukuba, Ibaraki 305-0032, Japan

• Eda Kazuyoshi

  Radiation Science Center, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan

• Sanami Toshiya

  Radiation Science Center, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan

• Takahashi Kazutoshi

  Radiation Science Center, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan

• Sonkawade Rajendra

  Inter University Accelerator Centre, Aruna Asaf Ali Marg, Post Box-10502, New Delhi 110 067, India

• Sanami Toshiya

  Radiation Science Center, Applied Research Laboratory, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

• Doke Tadayoshi

  Advanced Research Institute for Science and Engineering, Waseda University, Shinjuku, Tokyo 162-0044, Japan

• Tawara Hiroko

  Radiation Science Center, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan

• Kitajo Keiichi

  Space Station Engineering Department, Advanced Engineering Services Co., Ltd., Tsukuba, Ibaraki 305-0032, Japan

関連論文

• LET Distributions Measured at the CERF Facility with the RRMD-III
• Measurements of LET Distribution and Dose Equivalent onboard the Space Shuttle IML-2 (STS-65) and S/MM#4 (STS-79)
• Radiation Dosimetry Measurements with Real Time Radiation Monitoring Device (RRMD)-II in Space Shuttle STS-79
• Measurements of LET Distribution and Dose Equivalent onboard the Space Shuttle IML-2(STS-65)and S/MM#4(STS-79)
• Measurement of Electron Drift Velocities in the Mixture of Xe and He for a New High-Pressure Xe Gamma-Ray Detector
• Absolute Scintillation Yields in Liquid Argon and Xenon for Various Particles
• The Ion Composition in Solar Energetic Particle Events Observed in 1993-1995
• An Allene-Doped Liquid Argon Ionization Chamber for O and Ne Ions at 100 MeV/n
• Straggling in Energy Loss of Energetic Heavy Ions (Z≤8)in Thick Silicon Absorber
• Allene-Doped Liquid Ar Homogeneous Calorimeter for Measurement of Heavy Ion Fragmentation
• The Relationship between Corotating Energetic Ion Enhancement and Solar Wind Speed at 1AU
• A New Silicon Detector Telescope for Measuring the Linear Energy Transfer Distribution over the Range from 0.2 to 400 keV/μm in Space
• Measurement of Electron Drift Velocities in the Mixture of Xe and He for a New High-Pressure Xe Gamma-Ray Detector
• Operational Radiation Safety Program for Astronauts in Low-Earth Orbit : A Basic Framework, NCRP Report No. 142 : Recommendations of the National Council on Radiation Protection and Measurements, November 30, 2002, 168pp, ISBN 0-929600-75-4, National Coun
• Transport Properties of Electrons in Gaseous Xenon
• Determination of Charge and Energy for Particles Penetrating a Silicon ΔE×E Telescope in Space Radiation
• Absolute Calibration of Radioactive Neutron Source Strength by Geometrical Integration of Thermal Neutrons in Graphite Pile
• Measurement of a Linear Energy Transfer Distribution with Antioxidant Doped CR-39 Correcting for the Dip Angle Dependence of Track Formation Sensitivity
• Dosimetry for Neutrons from 0.25 to 15 MeV by the Measurement of Linear Energy Transfer Distributions for Secondary Charged Particles in CR-39 Plastic
• Measurement of Linear Energy Transfer Distribution at CERN-EU High-Energy Reference Field Facility with Real-Time Radiation Monitoring Device III and Its Comparison with Dosimetric Telescope
• 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
• An Allene-Doped Liquid Argon Ionization Chamber for O and Ne Ions at 100 MeV/n
• Allene-Doped Liquid Ar Homogeneous Calorimeter for Measurement of Heavy Ion Fragmentation

もっと見る 閉じる

スポンサーリンク