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Proceedings Paper

Restoring excited particle interaction potentials from laser spectroscopy data: Na broadened by CO2 as an example
Author(s): Lydia P. Zarkova; Peter S. Pirgov; Gabriela V. Paeva; Nikolay T. Guerassimov; Anatoly P. Nefedov; Vladimir A. Sinel'schikov; Alexandr D. Usachov; Mihail A. Homkin
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Paper Abstract

Preliminary results of restoring potentials of interactions Na(3s, 3p)-CO2(X1(Sigma) g+) from measured far wing spectra of sodium resonance line Na-D perturbed by CO2 are presented. The spectra in the range of (Delta) (sigma) approximately equals 10-3500 cm-1 are considered following the quasi-static theory of line broadening by inert gases as continua and due to the A $ARLR X and B $ARLR X transitions of Na-CO2 quasi-molecules. The reduced absorption coefficient K((sigma) ) at frequency (sigma) equals (sigma) 0 + (Delta) (sigma) is calculated as corresponding to the radiation from molecules with internuclear separation R, where hc(sigma) equals VA,B - VX. As a first approximation, all the three potentials are presented in the shape of a (6,12)-Lennard-Jones potential. The constants C6 and C12 are determined as independent variables by minimization of the sum of squared deviations between measured and calculated K((sigma) ). Four versions of minimization were considered successively: (1) only red wing, (2) only blue wing (3) both blue and red wings with 6 independent variables (C6 and C12), and (4) both wings with fixed C6. The calculated K((Delta) (sigma) ) are compared to the measured ones.

Paper Details

Date Published: 27 December 1996
PDF: 6 pages
Proc. SPIE 3052, Ninth International School on Quantum Electronics: Lasers--Physics and Applications, (27 December 1996); doi: 10.1117/12.262940
Show Author Affiliations
Lydia P. Zarkova, Institute of Electronics (Bulgaria)
Peter S. Pirgov, Institute of Electronics (Bulgaria)
Gabriela V. Paeva, Institute of Electronics (Bulgaria)
Nikolay T. Guerassimov, Institute of Electronics (Bulgaria)
Anatoly P. Nefedov, High Energy Density Research Ctr. (Russia)
Vladimir A. Sinel'schikov, High Energy Density Research Ctr. (Russia)
Alexandr D. Usachov, High Energy Density Research Ctr. (Russia)
Mihail A. Homkin, High Energy Density Research Ctr. (Russia)

Published in SPIE Proceedings Vol. 3052:
Ninth International School on Quantum Electronics: Lasers--Physics and Applications
Peter A. Atanasov, Editor(s)

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