By Joseph Berkowitz
Atomic and Molecular Photoabsorption, quantity 1 describes and catalogs to be had spectral details proper to how universal gases have interaction with solar and different assets of electromagnetic radiation resembling x-rays, flames, and plasmas. Photoabsorption is light's relief in depth and strength while it passes via a column of gasoline or liquid. This publication additionally incorporates a huge variety of information tables and figures which are useful to researchers simply because they assist them decide upon precisely which wavelengths to exploit of their experiments. The extra distinguishing point of this booklet is its synthesis throughout a large spectrum of wavelengths and compilation of information for a great number of atoms and molecules.
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Additional info for Atomic and Molecular Photoabsorption: Absolute Total Cross Sections
5 eV. We numerically integrate this structure, combining the O+ and O2+ contributions (mention is made in Stolte et al . (1997) of O3+ /O2+ ≈ 1/30). 064 (Berkowitz, 1997a), but there is compensation from the higher transitions. , 1993). We assume a linear decline in this interval. 16. 8–10 000 eV Data from the compilation of Henke et al . 4–10 000 eV. 8 104 –105 eV We use the calculated cross sections of Chantler (1995). 2 The analysis The experimental static electric dipole polarizability of atomic oxygen is not well known.
At 584 A, der Meer et al . 3 Mb. Subsequently, Berkowitz (1997b) showed by sum rule analysis that the higher value was clearly preferred. With some slight changes, this analysis is presented below. 1 Autoionization peaks (878–676 A) tions have been reported in several studies. Dehmer et al . , 1977) between threshold and 731 A, at a higher resolution. This region is dominated by autoionization peaks, mostly attributable to ns and nd series converging to O+ (2 D) and (2 P). 3 A. Samson were placed on an absolute scale by utilizing the calibration of Samson and Pareek (1985).
In this fashion, the ordinate in the photoion yield curve can be converted into an absolute cross section scale. 42 A 1977), but the areas should be invariant. In this analysis, we have concentrated ˚ region, since it is given in both spectra. 00 Mb. 0 A) Dehmer et al . (1973), Fig. 1 mm. 0 Mb mm−1 . 0 mm in the continuum intensity of Dehmer et al . (1977), Fig. 1. 0 Mb mm−1 . Upon measurement ˚ region in both figures, we obtain oscillator strengths that of the area of the 792 A are within ±10% of those inferred from the first procedure outlined above.