Spectral line shape in open-source atomic beam laser spectroscopy experiments |
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| Institution: | 1. Department of Physics, University of Žilina, Univerzitná 1, 010 01 Žilina, Slovakia;2. Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia;1. Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany;2. EN Department, CERN, 1211 Geneva 23, Switzerland;3. Helmholtz-Institut Mainz, 55128 Mainz, Germany;4. GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany;1. Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, 59072-970, Natal, RN, Brazil;2. Escola de Ciências e Tecnologia, Universidade Federal do Rio Grande do Norte, 59072-970, Natal, RN, Brazil |
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| Abstract: | The line shape in atomic beam laser spectroscopy experiments has been calculated for an atomic beam emitted from an open filament and propagated into the vacuum under collisionless conditions. It is shown that the activation energy the atoms have to overcome in order to leave the sample leads to significant deviations from the Voigt line shape. The unreliable application of the Voigt profile under the conditions specified above leads to an overestimate of the line width by up to 70%. A modified Voigt profile is given, which has proved a reliable capability to describe the line shape under the above mentioned conditions. |
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