Calibration of a monochromator/spectrometer system for the measurement of photoelectron angular distributions and branching ratios

We describe the techniques used in calibrating a monochromator/spectrometer system for gas-phase photoelectron angular distribution and branching ratio measurements. We report a self-consistent set of values for the Ne 2p, Ar 3p, Kr 4p sub 3/2 and 4p sub 1/2, and Xe 5p sub 3/2 and 5p sub 1/2 photoelectron asymmetry parameters and for the Kr 4p sub 3/2:4p sub 1/2 and Xe 5p sub 3/2:5p sub 1/2 branching ratios for the energy regions from threshold to approximately 15 iV.