The kinetics of optically excited Ne* and Kr* metastables in helium at high pressure

Michael C. Heaven; Jiande Han; Humayun Kabir

doi:10.1117/12.912929

24 February 2012 Collisional relaxation of the Kr(4p⁵5p) states in He, Ne, and Kr

Michael C. Heaven, Jiande Han, Humayun Kabir

Proceedings Volume 8238, High Energy/Average Power Lasers and Intense Beam Applications VI; Atmospheric and Oceanic Propagation of Electromagnetic Waves VI; 823807 (2012) https://doi.org/10.1117/12.912929
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

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.

Citation Download Citation

Michael C. Heaven, Jiande Han, and 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); https://doi.org/10.1117/12.912929

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