Multichannel quantum defect theory simulation of the zero‐kinetic‐energy photoelectron spectrum of H₂

The multichannel quantum defect theory (MQDT) is applied to the simulation of the v+=2 band of the zero‐kinetic‐energy (ZEKE) photoelectron spectrum of molecular hydrogen and also to the photoionization spectrum involving autoionizing Rydberg states in the region between the v+=1 and v+=2 thresholds. The results of the calculations are compared with previously reported experimental results [J. Chem. Phys. 96, 4149 (1992)]. The calculations are in very good agreement with experiment and provide quantitative confirmation of the previously proposed mechanisms for intensity perturbation.