Measurement of nuclear resonant scattering using synchrotron radiation with a fast scintillator

Abstract

  In nuclear resonant scattering experiments using synchrotron radiation, a new fast x-ray detector is requested for experiments at an excited level higher than 30 keV. We present a fast x-ray detector using an organic-inorganic perovskite scintillator of phenethylamine lead bromide (PhE-PbBr4). The scintillator has 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 was used to detect nuclear resonant scattering in ⁶¹Ni (the first excited level: 67.41 keV; lifetime: 7.6 ns). We could successfully record the decaying gamma rays emitted from ⁶¹Ni with a time resolution of 0.7 ns (FWHM) and a relatively high detection efficiency of 24%.