Fast X-ray detector system with simultaneous measurement of timing and energy for a single photon

Abstract

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, $10^6$ 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 \SI{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 $630\pm 50$ ps. We also demonstrated the reduction of background events caused by radioactive decays in a radioactive sample by discriminating photon energy.

arXiv comment7 pages, 12 figures

References in corpus (1)

• An ultra-fast superconducting Nb nanowire single-photon detector for soft X-rays

Cited by in corpus (6)

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• Absolute X-ray energy measurement using a high-accuracy angle encoder
• Energy response of X-rays under high flux conditions using a thin APD for the energy range of 6-33 keV
• Development of a measurement system enabling the reconstruction of gamma-ray time spectra by simultaneous recording of energy and time information