Transport properties of gaseous ions over a wide energy range. Part II

Abstract

This paper is a supplement to and extension of “Transport Properties of Gaseous Ions over a Wide Energy Range,” by H. W. Ellis, R. Y. Pai, E. W. McDaniel, E. A. Mason, and L. A. Viehland, Atomic Data and Nuclear Data Tables 17, 177–210 (1976). The previous paper presented a compilation of experimental ionic mobility data available in February 1976. The present article brings the mobility compilation up to date as of August 1978 and also presents data on ionic diffusion coefficients obtained from the time of the first good measurements up to August 1978. (Both longitudinal and transverse diffusion coefficients are included.) The criteria for selection of the mobility and diffusion data were (1) the measurements must cover a reasonably wide range of E N , the ionic energy parameter, (2) the identity of the ions must be well established, and (3) the accuracy of the data must be good. The mobility and diffusion data are tabulated as functions of E N . The theory of ionic mobility recently developed by Viehland and Mason is used to calculate zero-field mobilities for each ion-gas combination as functions of an effective common ion-gas temperature which ranges from 300°K up to thousands of degress, typically. The compilation of data is preceded by a discussion of the theory of ion transport in gases which serves to put the data compilation into perspective and show how it can be effectively utilized. The effects of inelastic collisions are briefly discussed. The use of mobility data to test or generate ion-neutral interaction potentials is described.