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Title: InAs avalanche photodiodes for X-ray detection
Authors: Gomes, R.B. 
Ker, P.J. 
Tan, C.H. 
David, J.P.R. 
Ng, J.S. 
Issue Date: 2011
Abstract: Pulse height spectra were obtained by irradiating 55Fe radioactive X-ray source on an InAs n-i-p APD cooled to 77K. The full width half maximum (FWHM) of the detected photopeak at 5.9 keV improves with increasing reverse bias. The FWHM decreases rapidly with gain from 2 keV at M = 1 to ∼950eV at M = 5.2, improving the minimum detectable energy and resolution of the APD. The larger than expected FWHM is due to non-optimised packaging that leads to increased leakage current of the detector. © 2011 IEEE.
Appears in Collections:COE Scholarly Publication

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