1. F. C. Fehsenfeld, E. E. Ferguson, and A. L. Schmeltekopf, J. Chem. Phys. 45, 1844 (1966). JCPSA60021-9606
2. The rate coefficients shown in Fig. 7 for these authors are recent revisions of the published values supplied by E. E. Ferguson (private communication, August 1967).
3. J. L. Moruzzi and A. V. Phelps, J. Chem. Phys. 45, 4617 (1966); JCPSA60021-9606
4. and Bull. Am. Phys. Soc. 11, 733 (1966). The associative detachment rate coefficients given in these references appear to be 25% too high because of nonstandard operation of the highpressure ionization gauge. The points in Fig. 7 corresponding to these data have been lowered accordingly.BAPSA60003-0503
5. L. Frommhold, Fortschr. Physik 12, 597 (1964).