Variation with temperature of the dissociative electron attachment to CH{sub 3}Br

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Bulletin of the American Physical Society

OSTI ID:127979

Datskos, P G; Christophorou, L G; Carter, J G ^[1]

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1. Oak Ridge National Lab., TN (United States)

The dissociative electron attachment to CH{sub 3}Br exhibits a remarkable dependence on the gas temperature. Low energy electrons (<1 eV) attach very weakly and dissociatively to CH{sub 3}Br at T=300 K but as T is increased to 700 K the electron attachment rate constant, k{sub a}({epsilon},T) increases by more that 2 orders of magnitude; the thermal value of k{sub a} is 1.08x10{sup {minus}11} cm{sup 3}s{sup {minus}1} at 300 K and increases (by more than 300 times) to 3.28x10{sup {minus}9} cm{sup 3}s{sup {minus}1} as T is raised to 700 K. The profound increases in k{sub a} with small changes in the internal energy of CH{sub 3}Br (which may be induced also with infrared excitation) make this molecule a potential candidate for pulsed power switching applications.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 127979
• Report Number(s): CONF-920376--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 37; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DISSOCIATION
ELECTRON ATTACHMENT
ELECTRON-MOLECULE COLLISIONS
METHYL BROMIDE
MILLI EV RANGE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K