The breakdown curves of ethyl and methyl radicals were estimated based on those of corresponding alkyliodides. Mass spectra of the radicals calculated from these breakdown curves using an estimated internal energy distribution are in good accordance with those obtained by electron impact.

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Photoelectron spectra of cyclohexane, cyclopentane, n-hexane and n-pentane have been studied. The vibrational structures of cyclohexane parent ion were clearly observed. The vibrational spacing is about 1160 cm−1 which can be assumed due to the C–C stretching vibrations. This spectrum was compared with the breakdown curves by charge exchange.

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Kα/Kβ intensity ratios of 54Cr formd by the decay of various 54Mn-labeled manganese compounds are compared with those of vanadium, chromium and manganese compounds excited with X-rays. In all cases the Kα/Kβ intensity ratios are found to depend on the chemical state of an X-ray emitting atom, decreaeasing in general with an increase in the oxidation number of the central metal ion.