A revised model is described for computing the nonlinear response of low-background Si:X photoconductive detectors to a given flux variation. The model gives results in good agreement with measured responses to large-amplitude sine wave and square wave flux modulations and implies a simple measurement procedure for calibrating a detector’s nonlinear response.
Alexander S. Zachor, E. Ray Huppi, I. Coleman, and D. G. Frodsham, "Nonlinear response of low-background extrinsic silicon detectors. 2: A revised model," Appl. Opt. 21, 2027-2035 (1982)