Conference Proceedings

Readout of LYSO using a new silicon photodetector for positron emission tomography

MLF Lerch, R Ward, PE Simmonds, VL Pervertailo, SR Meikle, GN Taylor, AB Rosenfeld

IEEE Nuclear Science Symposium Conference Record | Published : 2003

Abstract

This article focuses on the characterisation of three versions of a custom designed silicon photodetector using nuclear spectroscopy techniques. Room temperature gamma ray spectroscopy experiments have been performed using an LYSO excited by 137Cs and 22Na sources and read out by the new photodiodes. We have measured an energy resolution of 13.1% FWHM for the 511 keV gamma rays from a 22Na source and 11.2% FWHM for the 662 keV gamma rays from a 137Cs source. This is one of the best ever-reported energy resolutions for a lutetium based scintillator crystal read out by a silicon photodetector.

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