@article{oai:repo.qst.go.jp:00048261,
 author = {安藤, 昂輝（名古屋大学） and 山本, 誠一（名古屋大学） and 栗田, 圭輔 and 鈴井, 伸郎 and 尹, 永根 and 石井, 里美 and 河地, 有木 and 栗田 圭輔 and 鈴井 伸郎 and 尹 永根 and 石井 里美 and 河地 有木},
 issue = {9},
 journal = {Journal of Nuclear Science and Technology},
 month = {May},
 note = {Although a high-energy gamma camera can obtain images of Cs-137 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 Cs-137 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 a 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 ~5-mm FWHM and ~0.6 cps/MBq for the 1.5-mm pinhole collimator 10 cm from the collimator surface, respectively. We administered 5MBq of Cs-137 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 Cs-137 imaging in plants.},
 pages = {933--939},
 title = {Development of a low-energy high resolution X-ray camera for high-energy gamma photon background environments},
 volume = {54},
 year = {2017}
}