Abstract
Conditions for obtaining spontaneous population inversion between electronic levels in atomic or molecular ions as a result of selective velocity distributions in fast-moving plasmas are discussed. Experimental evidence from a plasma accelerator is presented which suggests that these conditions, which can occur between widely separated energy levels, are realizable, and the suitability of particular devices for use as a laser is also considered.
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More From: Journal of Physics B: Atomic and Molecular Physics
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