Super-radiance in the sodium resonance lines from sodium iodide arc lamps

Karabourniotis, D.; Drakakis, E.
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p061501
Academic Journal
Super-radiance observed within the centers of the sodium resonance D lines emitted by arc lamps containing sodium iodide as additive in a high-pressure mercury plasma environment was studied by high-resolution emission spectroscopy. The spectral radiance of these self-reversed lines including super-radiance was simulated by considering a local enhancement of the source function due to the presence of an additional source of radiation near the arc wall. Causes of this hitherto unrecognized source of radiation are given.


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