title: Kennard-Stepanov relation connecting absorption and emission spectra in an atomic gas.
abstract: The Kennard-Stepanov relation describes a thermodynamic, Boltzmann-type scaling between the absorption and emission spectral profiles of an absorber, which applies in many liquid state dye solutions as well as in semiconductor systems. Here we examine absorption and emission spectra of rubidium atoms in a dense argon buffer gas environment. We demonstrate that the Kennard-Stepanov relation between absorption and emission spectra is well fulfilled in the collisionally broadened atomic gas system. Our experimental findings are supported by a simple theoretical model.
authors.affiliation: Institute for Applied Physics, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Moroshkin
authors.affiliation: Institute for Applied Physics, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Weller
authors.affiliation: Institute for Applied Physics, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors.forename: Anne
authors.initials: A
authors.lastname: Sass
authors.affiliation: Institute for Applied Physics, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Klaers
authors.affiliation: Institute for Applied Physics, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Weitz