Temperature dependence of electron attachment and detachment in SF[sub 6] and [ital c]-C[sub 4]F[sub 6]

Journal Article · Tue Nov 30 23:00:00 EST 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.465584· OSTI ID:6048427

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

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

In the temperature, [ital T], range of 300--600 K and the mean electron energy range [l angle][epsilon][r angle] of 0.19--1.0 eV, the total electron attachment rate constant for SF[sub 6] and [ital c]-C[sub 4]F[sub 6] measured in dilute mixtures with N[sub 2], is virtually independent of [ital T]. Under the same experimental conditions the stabilized SF[sup [minus]][sub 6] anion does not undergo autodetachment but the stabilized [ital c]-C[sub 4]F[sup [minus]][sub 6] anion undergoes a profound increase in autodetachment (by about four orders of magnitude). This difference between the SF[sup [minus]][sub 6] and the [ital c]-C[sub 4]F[sup [minus]][sub 6] anions is attributed to the larger electron affinity of the SF[sub 6] molecule compared to the [ital c]-C[sub 4]F[sub 6] molecule. The heat-activated autodetachment for [ital c]-C[sub 4]F[sup [minus]][sub 6] is related to increases in the internal energy content of the [ital c]-C[sub 4]F[sup [minus]][sub 6] anion and is found to have an activation energy of 0.237 eV. The limiting electric field strength'' of SF[sub 6] was found to increase by [similar to]11% as [ital T] was increased from 300 to 600 K.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6048427
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 99:11; ISSN JCPSA6; 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
AFFINITY
ALKENES
ANIONS
BUTENES
CHARGED PARTICLES
DISPERSIONS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELEMENTS
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
IONS
MIXTURES
MOLECULES
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLYATOMIC MOLECULES
SULFUR COMPOUNDS
SULFUR FLUORIDES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
USES