The mass spect rum of sulfur vapor has been measu red by evapo ra t in g sulfur from a heated t ube directly in to t he ionization chambe r of a mass sp ectrometer. I ons S;; w it h x ra nging fro m 1 to 8 are obse rved with St most ab unda n t. I sotopc ab undances we re comp uted f rom t he S;ions. The appearance p otentials of S: and St are respectIvcl.v 8.9 0.2 a nd 8.3 0.2 electron volts. This suggests t hat t he vapor in t he ioni zation chamber is a mixture of molec ules co ntaining S2 a nd S8 and poss ibly other molecules.
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Bradt et al. (1956) studied this question.