論文

2017年

Development of a low-energy high resolution X-ray camera for high-energy gamma photon background environments

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
  • Koki Ando
  • ,
  • Seiichi Yamamoto
  • ,
  • Keisuke Kurita
  • ,
  • Nobuo Suzui
  • ,
  • Yong-Gen Yin
  • ,
  • Satomi Ishii
  • ,
  • Naoki Kawachi

54
9
開始ページ
933
終了ページ
939
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1080/00223131.2017.1323690
出版者・発行元
TAYLOR & FRANCIS LTD

Although a high-energy gamma camera can obtain images of 137Cs distribution by detecting the 662-keV gamma photons, its spatial resolution is reduced because high-energy gamma photons penetrate the edge of the pinhole collimator. To solve this problem, we developed a low-energy X-ray camera that detects the characteristic X-ray photons (32-37 keV) that are emitted from 137Cs to obtain high resolution images. We used a 45 x 45 x 1-mm-thick NaI(Tl) scintillator that was encapsulated in 0.1-mm-thick aluminum and optically coupled to a 2-inch square, position sensitive photomultiplier tube (Hamamatsu Photonics, PSPMT: H12700 MOD) as an imaging detector. The imaging detector was encased in a 2-cm-thick tungsten alloy container and a pinhole collimator was attached to its camera head. The spatial resolution and sensitivity were similar to 5mmfull-width at half-maximum and similar to 0.6 cps/MBq for the 1.5-mm pinhole collimator 10 cm from the collimator surface, respectively. We administered 5 MBq of 137Cs to a soybean seedling, imaged the distribution of radionuclides for six hours, and successfully obtained a high resolution image of it with our developed X-ray camera. We believe our camera will be a powerful tool for such 137Cs imaging in plants.

リンク情報
DOI
https://doi.org/10.1080/00223131.2017.1323690
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000407644000002&DestApp=WOS_CPL
ID情報
  • DOI : 10.1080/00223131.2017.1323690
  • ISSN : 0022-3131
  • eISSN : 1881-1248
  • Web of Science ID : WOS:000407644000002

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