Abstract
The K absorption spectra of chlorine in gaseous CH3Cl, C2H5Cl, CF2Cl2, and C2H3Cl were recorded with a high resolving curved crystal spectrograph using the continuous radiation of a gold anode. The background radiation accompanying the bremsstrahlung was determined quantitatively. Thus absolute absorption cross sections could be evaluated. The absorption spectra consist of a Rydberg-like series of lines in which the third and higher components are not resolved. A theory for the interpretation of X-ray absorption spectra established by Wainstein et al. (1951) is discussed with regard to the experimental spectra obtained in this investigation.

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