Gaseous Electronics

51

CHLORODIBROMO-METHANE

CONTENTS

51.1 Attachment Rate Coefficients

51.2 Attachment Cross Sections

References

 

Chlorodibromomethane (CHBr₂Cl) is a polar, electron-attaching gas that has 95 electrons. The ionization potential is 10.59 eV.

51.1 ATTACHMENT RATE COEFFICIENTS

Dissociative attachment occurs through the formation of Br⁻ and Cl⁻ ions according to the following reactions (Ipolyi et al., 2004):

$${\text{CHBr}}_2\text{Cl}+\text{e}(0\text{eV})\to \text{CHBrCl}+\text{Br}+0.68\text{eV}$$ (51.1)

$${\text{CHBr}}_2\text{Cl}+\text{e}(0\text{eV})\to {\text{CHBr}}_2+{\text{Cl}}^{-}+0.27\text{eV}$$ (51.2)

TABLE 51.1Attachment Rate Coefficients for CHBr₂Cl

Method	Temperature, K, (eV)	Rate (10−14 m3/s)	Reference
Beam	321	2.7	Ipolyi et al. (2004)
FA/LP	300	3.0 (total)	Španěl and Smith (2001)
2.8 (Br−)
0.14 (Cl−)
540	4.9 (total) ...