Abstract
We derive the spectral line shape for collinear fast beam laser spectroscopy. As initial condition we take a thermally distributed ensemble into account. While the thermal velocity distribution of the fast ensemble has an asymmetric structure due to the acceleration by the electrostatic field, under typical experimental conditions the convolution with the natural line shape preserves the Lorentz profile with negligible broadening. However, the spectral line as a whole experiences a small shift depending on the temperature of the source and the acceleration .
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Kretzschmar, M., Götte, S., Ewald, G. et al. Influence of the thermal motion on the line shape and position of resonances in collinear fast beam laser spectroscopy. Appl Phys B 79, 623–627 (2004). https://doi.org/10.1007/s00340-004-1608-1
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DOI: https://doi.org/10.1007/s00340-004-1608-1