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Publication Citation: Thermalization of velocity-selected excited-state populations by resonance exchange collisions and radiation trapping

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Author(s): J Huennekens; A Allegrini; Zeina J. Kubarych; R Sagle; R K. Namiotka;
Title: Thermalization of velocity-selected excited-state populations by resonance exchange collisions and radiation trapping
Published: June 01, 1995
Abstract: Populations of excited atoms that all have the same z component of velocity can be produced by pumping a vapor with a narrow-band laser. This velocity-selected population is then thermalized by velocity-changing collisions. However, in a pure vapor, even at low densities where velocity-changing collisions can be ignored, the mechanisms of radiation trapping and resonance exchange collisions can still lead to substantial thermalization of excited-atom velocity distributions. In this paper, we present data demonstrating these effects. We compare our data with results from a simple model of these processes. The model is in qualitative agreement with the experimental results.
Citation: Physical Review
Volume: A, 51 (6)
Pages: pp. 4472 - 4482
Keywords: Atomic collision;Laser spectroscopy;Optical physics
Research Areas: Metrology