24 February 2012 Collisional relaxation of the Kr(4p55p) states in He, Ne, and Kr
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Metastable excited rare gas atoms are currently being considered for use in optically pumped laser systems. Understanding the collisional relaxation kinetics of the relevant excited states is of central importance for this application. In the present study, collisional deactivation rate constants for excited states of Kr(4p55p) atoms colliding with ground state rare gas atoms Rg (=He, Ne, and Kr) have been determined from time- and wavelengthresolved fluorescence measurements. Metastable Kr(4p55s) atoms were generated using a pulsed electrical discharge. A pulsed laser was then used to excited transitions states that correlated with the Kr(4p55p) configuration. Total removal rate constants and intramultiplet state-to-state energy transfer rate constants were derived from the wavelength- and time-resolved fluorescence data by computational modeling. The data were simulated by fitting to numerical solutions of a set of coupled differential equations describing the full set of collisional transfer processes. The results indicate that Kr(4p55p) + He and Kr(4p55p) + Ne mixtures are suitable for use in optically pumped lasers.
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Michael C. Heaven, Michael C. Heaven, Jiande Han, Jiande Han, Humayun Kabir, Humayun Kabir, } "Collisional relaxation of the Kr(4p55p) states in He, Ne, and Kr", Proc. SPIE 8238, High Energy/Average Power Lasers and Intense Beam Applications VI; Atmospheric and Oceanic Propagation of Electromagnetic Waves VI, 823807 (24 February 2012); doi: 10.1117/12.912929; https://doi.org/10.1117/12.912929

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