title: Negative ion formation and motion in a mixture of CCl4 and Ar.
abstract: This paper deals with the measurement of the mobility of negative ions in the mixtures of CCl4 with Ar with the CCl4 ratio up to 33.3%. The pulsed Townsend technique was employed to produce an integrated ionic avalanche over a range of the density-reduced electric field E/N for which ionization is either negligible or absent, and attachment processes are dominant, leading to the formation of mostly CCl-4. The E/N range of measurement was 1-50 Td (1 Td=10(-17) V cm(2)). Our measurements strongly suggest that attachment is the dominant process and only negative ions are formed.
authors.affiliation: Facultad de Ciencias, Universidad Autonoma del Estado de Morelos, Avenida, Universidad 1001, Colonia Chamilpa, Codigo Postal 62210 Cuernavaca, Morelos, Mexico. fbyousif@servm.fc.uaem.mx
authors.forename: F B
authors.initials: FB
authors.lastname: Yousif
authors.forename: H
authors.initials: H
authors.lastname: Martínez