Abstract

The photoabsorption cross section of the Ar₂F excimer in the lowest excited state (4²Γ), which is produced by exciting an Ar/F₂ gas mix by a short-pulse relativistic electron beam, has been determined at 248 nm to be (3.3 ± 1) × 10⁻¹⁸ cm² by observing the depletion of Ar₂F fluorescence induced by the irradiation of a short-pulse KrF laser beam. Observation of ArF fluorescence shows that the Ar₂F excimer is directly dissociated into ArF and Ar by absorbing a 248-nm photon.

© 1988 Optical Society of America

Precision measurements of photoabsorption cross sections of Ar, Kr, Xe, and selected molecules at 58.4, 73.6, and 74.4 nm

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