Absolute Calibration of Radioactive Neutron Source Strength by Geometrical Integration of Thermal Neutrons in Graphite Pile

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概要

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• Absolute calibrations of radioactive neutron source strength $Q$ n/s have so far been conventionally carried out by means of the so-called water-bath or MnSO4-bath technique using a water moderator. Here, we present the method and results of a new technique for the absolute calibration of $Q$ by elaborately integrating the spatial distributions of thermal neutron flux inside and on the surface of the high-purity graphite moderator with dimension of $2.5 \times 1.9 \times 1.9$ m3. The combined standard uncertainty for absolute $Q$ obtained from the presented technique was $\pm 2.0$%, which is comparable to those of the conventional methods.

• 2008-05-25

著者

• Hagiwara Masayuki

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

• Sanami Toshiya

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

• Michikawa Taichi

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

• Sasaki Shin-ichi

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

• Kadotani Hiroyuki

  Faculty of Informatics, Shizuoka Sangyo University, 4-1-1 Surugadai, Fujieda, Shizuoka 426-8668, Japan

関連論文

• Absolute Calibration of Radioactive Neutron Source Strength by Geometrical Integration of Thermal Neutrons in Graphite Pile
• 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

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