Abstract

Collisional coupling between the electronic excited states of I2 that are responsible for the green and ultraviolet (D′A′) bands of the molecule (centered at 506 and 342 nm, respectively) has been studied in electron-beam-pumped mixtures of argon and hydrogen iodide (HI). The dependence of the temporal decay of the green and UV fluorescence waveforms on the buffer-gas pressure demonstrates that the two bands do not originate from a common upper state. The interdependence of the two bands, however, is clear from the disappearance of gain at 506 nm, when an optical cavity having a high Q at 342 nm is installed around the excited medium (IUV ∼ 30 MW cm−2). Also, the peak intensity of the UV band is suppressed by more than 40% when a green dye-laser pulse (λ = 503 nm, I ≥ 5 MW cm−2) is directed along the axis of the active medium.

© 1985 Optical Society of America

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Corrections

K. P. Killeen and J. G. Eden, "Coupling of the green (506-nm) and ultraviolet (342-nm) emission bands of I2: erratum," J. Opt. Soc. Am. B 2, 1955-1955 (1985)
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-2-12-1955

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