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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.|
|Volume:||A, 51 (6)|
|Pages:||pp. 4472 - 4482|
|Keywords:||Atomic collision,Laser spectroscopy,Optical physics|