Gaseous Electronics

46

BROMOCHLORO-METHANE

CONTENTS

46.1 Ionization Cross Section

46.2 Attachment Rate Coefficient

46.3 Attachment Cross Sections

References

 

Bromochloromethane (CH₂BrCl), synonym Halon 1011, is a polar, electron-attaching gas that has 60 electrons. Its electronic polarizability is quoted as 8.34 × 10⁻⁴⁰ F m² (see Beran and Keran, 1969), dipole moment 1.66 D, and ionization potential 10.77 eV. The vibrational modes and energies are shown in Table 46.1.

46.1 IONIZATION CROSS SECTION

A single value of total ionization cross section of 14.7 × 10⁻²⁰ m² at 70 eV electron energy is reported by Beran and Kevan (1969).

TABLE 46.1Vibrational Modes and Energies for CH₂BrCl

Mode	Type of Motion	Energy (meV)
ν1	CH2 s-stretch	372.3
ν