Field-Induced Autoionization in Rare-Gas Absorption Spectra near the Ionization Threshold

Abstract
The effect of electric fields of up to 22 kV/cm on the absorption cross sections of argon and krypton have been obtained near the ionization limit. In both gases the field-induced cross section below the limit is found to represent the predicted oscillator-strength distribution. In krypton, additional field-induced fine structure appears below the limit.