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The He(I) photoelectron spectra of As4 and As2 have been recorded from heated solid arsenic and copper arsenide. The spectra were interpreted with the aid of Hartree–Fock–Slater calculations. Pyrolysis of As2 vapour has enabled the photoelectron spectrum of atomic arsenic to be recorded. The spectra obtained demonstrate the ability of photoelectron spectroscopy to monitor the vapour-phase composition above solid arsenic or a metal arsenide as a function of temperature.
Dyke et al. (Wed,) studied this question.