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Updated: Jun 17, 2026

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
Vibrational energy level population in optically pumped AgCI vapor
1School of Mathematical and Physical Sciences, University of Sussex, Brighton, UK.
Abstract:
A process is discussed which could lead to laser oscillation in the uv, employing vibrational energy levels in different electronic states of a diatomic molecule. A pulse from a Lyman discharge tube is passed through AgCl vapor. Absorption and subsequent fluorescence occur and analysis of the resulting output pulse, together with previously measured values of the lifetimes involved, enable the populations of eight vibrational energy levels to be computed. No inversion is found to occur between the two electronic states but inversions 5 x 10(9)mol/cm(3) are found to occur between pairs of vibrational levels in the same electronic state.
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