Measurement of thermal neutron fluence distribution with use of 23Na radioactivation around a medical compact cyclotron

Toshioh Fujibuchi, Ichiro Yamaguchi, Tetsuharu Kasahara, Takashi Iimori, Yoshitada Masuda, Ken Ichi Kimura, Hiroshi Watanabe, Tomonori Isobe, Takeji Sakae

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)

抄録

A medical compact cyclotron produces about 1015 neutrons per day along with 100 GBq of 18F. Therefore, it is important to establish radiation safety guidelines on residual radioactivity for routine operation, maintenance work, and decommissioning. Thus, we developed a simple method for measuring the thermal neutrons in a cyclotron room. In order to verify the feasibility of our proposed method, we measured the thermal neutron distribution around a cyclotron by using the activation of 23Na in salt. We installed 78 salt dosimeters in the cyclotron room with a 50 cm mesh. The photopeak of 24Na was measured, and the neutron flux distribution was estimated. Monitoring the neutron flux distribution in a cyclotron room appears to be useful for not only obtaining an accurate estimate of the distribution of induced radioactivity, but also optimizing the shield design for radiation safety in preparation for the decommissioning process.

本文言語英語
ページ(範囲)159-165
ページ数7
ジャーナルRadiological physics and technology
2
2
DOI
出版ステータス出版済み - 7月 2009
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 放射線
  • 理学療法、スポーツ療法とリハビリテーション
  • 放射線学、核医学およびイメージング

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