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Measurement of the absolute 4d-photoabsorption cross section of atomic barium Export

by: Borne, F. Federmann, M. K. Lee, B. Sonntag
Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 28, No. 13. (1995), pp. 2591-2598.

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cross photoabsorption section

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The absolute photoabsorption cross section of atomic barium in the region of the 4d-giant resonance (80-140 eV) has been determined. The vapour density in the absorbing metal vapour column, required for the determination of the absolute cross sections was measured quasi-simultaneously with the absorption using a Mach-Zehnder interferometer. Our data show good agreement in terms of spectral signature with existing relative photoabsorption measurements. The measured absolute cross section corroborates the results of recent many-body calculations.


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