Feasibility study on using imaging plates to estimate thermal neutron fluence in neutron-gamma mixed fields

Toshioh Fujibuchi, Yu Tanabe, Takeji Sakae, Toshiyuki Terunuma, Tomonori Isobe, Hiraku Kawamura, Kiyoshi Yasuoka, Tetsuro Matsumoto, Hideki Harano, Jun Nishiyama, Akihiko Masuda, Akihiro Nohtomi

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

In current radiotherapy, neutrons are produced in a photonuclear reaction when incident photon energy is higher than the threshold. In the present study, a method of discriminating the neutron component was investigated using an imaging plate (IP) in the neutron-gamma-ray mixed field. Two types of IP were used: a conventional IP for beta- and gamma rays, and an IP doped with Gd for detecting neutrons. IPs were irradiated in the mixed field, and the photo-stimulated luminescence (PSL) intensity of the thermal neutron component was discriminated using an expression proposed herein. The PSL intensity of the thermal neutron component was proportional to thermal neutron fluence. When additional irradiation of photons was added to constant neutron irradiation, the PSL intensity of the thermal neutron component was not affected. The uncertainty of PSL intensities was approximately 11.4 %. This method provides a simple and effective means of discriminating the neutron component in a mixed field.

本文言語英語
論文番号ncq493
ページ(範囲)394-400
ページ数7
ジャーナルRadiation Protection Dosimetry
147
3
DOI
出版ステータス出版済み - 11月 2011
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 放射線
  • 放射線技術および超音波技術
  • 放射線学、核医学およびイメージング
  • 公衆衛生学、環境および労働衛生

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