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Fast scintillation detectors for high-energy X-ray region
Authors:Shunji Kishimoto  Fumihiko Nishikido  Rie Haruki  Kengo Shibuya  Masanori Koshimizu
Affiliation:1. High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan
2. National Institute of Radiological Science, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
3. Japan Atomic Energy Agency, 2-4 Shirakata Shirane, Tokai, Naka, Ibaraki, 319-1195, Japan
4. University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan
5. Tohoku University, 6-6 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
Abstract:We have developed fast scintillation detectors for nuclear resonant scattering experiments using synchrotron radiation and a nuclear excited level existing in >30?keV. A fast x-ray detector using an organic-inorganic perovskite scintillator of phenethylamine lead bromide (PhE-PbBr4) had a dominant light emission with a fast decay time of 9.9?ns. An x-ray detector equipped with a 0.9-mm-thick PhE-PbBr4 crystal (size: ~8 × 7?mm2) was used to detect nuclear resonant scattering in 61Ni (the first excited level: 67.41?keV; half-life: 5.3?ns). We could successfully record the decaying gamma rays emitted from 61Ni with a relatively high detection efficiency of 24%. A lead-doped plastic scintillator (NE142, Pb ~5?wt% doped) had been known to have a faster decay time of 1.7?ns. Following a test of a single NE142 detector, a four-channel NE142 detector was fabricated and successfully applied to the synchrotron-radiation based M?ssbauer spectroscopy experiment on 61Ni.
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