Abstract
Anomalies in the Fulcher-band (d3Πu-a3Σ+g) spectra, which are widely used for the purpose of measuring ro-vibronic structure of the hydrogen molecule, are investigated using the hollow cathode glow discharge of 230V - 70 mA at 30 Pa. By making use of the recently developed analyzing scheme and experimentally determined lifetime of the state involved, the historical data in the Ginsburg and Dieke's publication are reanalyzed and compared with our present data. Populations of the vibronic state (v'≥4 in the Q branch can be corrected to a considerable extent by taking into account the lifetime of the states, while those of any v' the P and R branches cannot. However, the average values of the upper-Fulcher populations deduced from the P and R branches coincide with those from Q branch by taking into consideration the difference in the excitation from the ground electronic state.
