Abstract

Superradiant and laser emissions of the XeF (C → A) transition were observed at 530 nm in liquid argon for the first time to our knowledge. The liquid samples were prepared from Ar/Xe/F₂ mixtures in a ratio of 1600:10:1 and pumped by a commercial excimer laser at 351 nm. Dramatic line narrowing of the initially broad (FWHM ∼60 nm) C → A fluorescence spectrum was induced at elevated pump powers. The XeF (C) state excimer number density was estimated to be in excess of 5.26 × 10¹⁷ cm⁻³.

© 1991 Optical Society of America

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