Eh. Bellamy et al., ABSOLUTE CALIBRATION AND MONITORING OF A SPECTROMETRIC CHANNEL USING A PHOTOMULTIPLIER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 339(3), 1994, pp. 468-476
A method for measuring the photomultiplier gain using a realistic phot
omultiplier response function is described. A precision of about 1% fo
r the deconvoluted gain parameter can be achieved.