RI中性子線源  [in Japanese] A Radioisotope Neutron Source and its Application for Dosimetry  [in Japanese]

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Author(s)

    • 古渡 意彦 Kowatari Munehiko
    • 日本原子力研究開発機構 原子力科学研究所 放射線管理部 Division of Radiation Protection, Nuclear Science Research Institute, Japan Atomic Energy Agency

Abstract

<p>A various kinds of radioactive neutron sources have been developed since neutron had been first discovered. The reactions which are mainly taken advantage for generating neutrons as radioactive neutron source are (α,n) reaction, (γ,n) reaction and nuclear fission reaction. Only <sup>241</sup>Am-Be and <sup>252</sup>Cf neutron sources are now available due to reliable reproducibility of neutron emission, long half-lives and less disturbing gamma ray emission. Both are designated as a "reference neutron source" by ISO 8529 series describing principle of establishment of neutron calibration field. Total neutron emission rate from neutron source must be well defined in terms of sophisticated method by national metrological laboratory. In order to serve a reliable neutron calibration field produced by a RI neutron source, correction factor for anisotropic emission from cylindrical-shaped neutron source must be experimentally determined for neutron fluence rate at a point of test in the calibration laboratory.</p>

Journal

  • hamon

    hamon 27(3), 109-112, 2017

    The Japanese Society for Neutron Science

Codes

  • NII Article ID (NAID)
    130007510628
  • NII NACSIS-CAT ID (NCID)
    AA11905115
  • Text Lang
    JPN
  • ISSN
    1349-046X
  • NDL Article ID
    028470703
  • NDL Call No.
    Z74-D924
  • Data Source
    NDL  J-STAGE 
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