Gaseous Electronics

68

TETRABROMOMETHANE

CONTENTS

68.1 Total Scattering Cross Sections

68.2 Attachment Rate Constant

68.3 Attachment Cross Sections

References

 

Tetrabromomethane (CBr₄), synonym carbon tetrabromide, is a nonpolar, electron-attaching gas that has 146 electrons. The ionization potential is 10.31 eV. The molecule has four vibrational modes as shown in Table 68.1.

68.1 TOTAL SCATTERING CROSS SECTIONS

Calculated total scattering cross sections in the low-energy range (≤4.0 eV) are provided by Olthoff et al. (1986) as shown in Table 68.2 and Figure 68.1.

68.2 ATTACHMENT RATE CONSTANT

Dissociative attachment occurs due to reaction

$${\text{CBr}}_4+\text{e}\to {\text{CBr}}_2+{\text{Br}}_2^{-}$$ (68.1)

TABLE 68.1Vibrational Modes and Energies of CBr₄

Mode	Type of Motion	Energy (meV) ...