[19p-W810-1~16] 2.2 Detection systems

△ [19p-W810-1] A Scintillation X-ray Detector Using Proportional-mode Si-APD and HfO₂ – loaded Plastic Scintillator

〇Keisuke Inoue¹, Shunji Kishimoto², Rie Haruki², Masanori Koshimizu³, Tomoyuki Hirata³, Fumihiko Nishikido⁴ (1.SOKENDAI, 2.KEK / IMSS, 3.Tohoku Univ., 4.NIRS)

Keywords:X-ray Detector,Fast response,Avalanche photodiode

To obtain both a fast response and a detection efficiency sufficient for high-energy X-rays of >30 keV, we tested a scintillation detector using a proportional-mode silicon avalanche photodiode. In case of using a HfO₂-loaded plastic scintillator, a good time resolution of 0.34 ±0.06ns (FWHM) was obtained for 57.6 keV X-rays. This was a better value than that of a Pb-loaded plastic scintillator (0.54±0.06 ns).