1. S. Meyerson and R. W. Vander Haar, J. Chem. Phys. 37, 2458 (1962).JCPSA60021-9606
2. F. H. Dorman and J. D. Morrison, J. Chem. Phys. 35, 575 (1961).JCPSA60021-9606
3. The statement that this is well known is an assumption of the author. Certainly anyone who has run argon on an instrument of this type has observed the occurrence of Ar3+ in the spectrum. The pattern factor for this peak varies widely however, apparently owing to small changes in operating parameters.
4. F. H. Dorman and J. D. Morrison, J. Chem. Phys. 34, 1407 (1961).JCPSA60021-9606