A technique is described for determining the relative efficiency with wavelength of a monochromator and detector system using single photon detection. The method described utilizes a commercially available standard of spectral irradiance and provides a convenient, straightforward, and accurate technique for making the calibration, which is applicable over large ranges of wavelength and detector sensitivity. The calibration procedure has been designed to fill a need in atomic spectroscopy for a convenient method of determining the relative intensities of spectral lines in measurements which require single photon detection.
J. L. Kohl, L. J. Curtis, D. A. Chojnacki, and R. M. Schectman, "A Convenient Technique for Determining the Relative Quantum Efficiency of a Monochromator and Detector System," Appl. Opt. 10, 34-37 (1971)