学術雑誌論文 Fast x-ray detector system with simultaneous measurement of timing and energy for a single photon

Masuda, Takahiko  ,  Okubo, S.  ,  Hara, H.  ,  Hiraki, T.  ,  Kitao, S.  ,  Miyamoto, Y.  ,  Okai, K.  ,  Ozaki, R.  ,  Sasao, N.  ,  Seto, M.  ,  Uetake, S.  ,  Yamaguchi, A.  ,  Yoda, Y.  ,  Yoshimi, A.  ,  Yoshimura, K.

88 ( 6 )  , p.063105 , 2017-06 , American Institute Of Physics
ISSN:0034-6748
NII書誌ID(NCID):AA00817730
内容記述
We developed a fast X-ray detector system for nuclear resonant scattering (NRS) experiments. Our system employs silicon avalanche photo-diode (Si-APD) as a fast X-ray sensor. The system is able to acquire both timing and energy of a single X-ray photon simultaneously in a high rate condition, 106 counts per second for one Si-APD. The performance of the system was investigated in SPring-8, a synchrotron radiation facility in Japan. Good time resolution of 120 ps (FWHM) was achieved with a slight tail distribution in the time spectrum by a level of 10-9 at 1 ns apart from the peak. Using this system, we successfully observed the NRS from the 26.27-keV level of mercury-201, which has a half-life of 630(50) ps. We also demonstrated the reduction of background events caused by radioactive decays in a radioactive sample by discriminating photon energy.
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http://ousar.lib.okayama-u.ac.jp/files/public/5/55447/20171023162235867918/RSI_88_6_63105.pdf

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