Gaseous Electronics

58

DICHLOROMETHANE AND DIFLUOROMETHANE

CONTENTS

58.1 Total Cross Sections

58.2 Ionization Cross Sections

58.3 Attachment Cross Sections

58.4 Elastic and Momentum Transfer Cross Sections

58.5 Addendum

58.5.1 Ion Appearance Potentials

58.5.2 Ionization Cross Section

References

 

Dichloromethane (CH₂Cl₂) and difluoromethane (CH₂F₂) are molecules in which two hydrogen atoms of methane are substituted by chlorine and fluorine atoms, respectively. The substitution renders both the molecules polar and electron-attaching. They have 42 and 26 electrons, respectively. Selected properties of the molecules are shown in Table 58.1.

Vibrational excitation modes and energies of the molecules are shown in Table 58.2. Theoretical integral ...