The interaction of excited states of barium with xenon atoms determined by spectral-line contour measurements
- 14 January 1978
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 11 (1), 25-36
- https://doi.org/10.1088/0022-3700/11/1/009
Abstract
The wings of barium absorption lines for the series 6s2 1S0-6snp1P1(n=7-11) have been measured with high resolution for barium in the presence of less than an atmosphere of xenon in the temperature range 1000-1100K. Tables of normalised linewing-spectra are presented. These spectra were analysed with both the unified Franck-Condon theory and a numerical evaluation of the correlation function of semiclassical line-broadening theory. Both analyses lead to similar barium-xenon potentials for these excited states, and demonstrate that the intense regions in the line wings arise from collisions occurring when the perturbing atom has penetrated within the valence-electron charge-density maximum of the excited barium atom. Comparisons of the potentials derived from these line contours are made with available calculations.Keywords
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