Effect of temperature on the attachment of slow ( le 1 eV) electrons to CH sub 3 Br

Journal Article · Tue Dec 15 04:00:00 EST 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.463329· OSTI ID:7198437

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

---

1. Atomic, Molecular, and High Voltage Physics Group, Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6122 (United States)

The electron attachment rate constant {ital k}{sub {ital a}}({l angle}{epsilon}{r angle}, {ital T}) for CH{sub 3}Br has been measured in a buffer gas of N{sub 2} using a high pressure electron swarm apparatus, within the mean electron energy range from thermal ({similar to}0.046 eV) to 0.87 eV and over the temperature range, {ital T}, 300--700 K. At room temperature, CH{sub 3}Br attaches low energy electrons weakly but as {ital T} is raised from 300 to 700 K the total electron attachment cross section increases by more than 2 orders of magnitude. At {ital T}=300 K the electron attachment cross section exhibits a peak at 0.38 eV which shifts progressively to lower electron energies as {ital T} is increased. The thermal value of {ital k}{sub {ital a}} is 1.08{times}10{sup {minus}11} cm{sup 3} s{sup {minus}1} at 300 K and 3.28{times}10{sup {minus}9} cm{sup 3} s{sup {minus}1} at 700 K.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7198437
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 97:12; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
BROMINATED ALIPHATIC HYDROCARBONS
BUFFERS
CROSS SECTIONS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EQUIPMENT
EV RANGE
FERMIONS
HALOGENATED ALIPHATIC HYDROCARBONS
LEPTONS
METHYL BROMIDE
NITROGEN
NONMETALS
ORGANIC BROMINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RECOMBINATION
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K