Gaseous Electronics

Appendix 8: Important Relationships

CONTENTS

A8.1 Definition of Terms for Attachment

A8.2 Attachment Rate

A8.3 Attachment Cross Sections

A8.4 Maximum Scattering Cross Section

A8.5 Reduced Electric Field

A8.6 Reduced Transport Coefficients

A8.7 Density-Reduced Growth Coefficients

A8.8 Gas Constants

References

 

A8.1 DEFINITION OF TERMS FOR ATTACHMENT

As an example we consider the molecule chloromethane (CH₃Cl). The potential curve of the molecule and its negative ion are drawn to scale as shown in Figure A8.1 (Barszczewska et al., 2003). The following quantities are easy to identify (see Table A8.1).

A negative sign is usually assigned to the electron affinity (EA) of the molecule, if the asymptote of the negative ion curve ...