2013
DOI: 10.1063/1.4801657
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A novel technique for measurement of thermal rate constants and temperature dependences of dissociative recombination: CO2+, CF3+, N2O+, C7H8+, C7H7+, C6H6+, C6H5+, C5H6+, C4H4+, and C3H3+

Abstract: A novel technique using a flowing afterglow-Langmuir probe apparatus for measurement of temperature dependences of rate constants for dissociative recombination (DR) is presented. Low (~10(11) cm(-3)) concentrations of a neutral precursor are added to a noble gas∕electron afterglow plasma thermalized at 300-500 K. Charge exchange yields one or many cation species, each of which may undergo DR. Relative ion concentrations are monitored at a fixed reaction time while the initial plasma density is varied between … Show more

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Cited by 22 publications
(12 citation statements)
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References 53 publications
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“…329828.8 215.9 3.34 × 10 −4 29 trans-HONO 14 5 9 -13 5 8 329829.2 215.9 3.34 × 10 −4 29 trans-HONO 14 4 11 -13 4 10 330071.5 181.0 3.52 × 10 −4 29 trans-HONO 14 3 12 -13 3 11 330281.2 153.8 3 -0.5 -0.5 -0.5 -0.5 0 0 0 0 3 3 3 3 0 0 0 0 Rate by comparison with similar DR (Fournier et al 2013;Florescu-Mitchell & Mitchell 2006;Geppert et al 2004) and branching ratios deduced roughly from similar reactions using Plessis et al (2012). The important fact is that HONO is likely non negligible product.…”
Section: Moleculementioning
confidence: 96%
“…329828.8 215.9 3.34 × 10 −4 29 trans-HONO 14 5 9 -13 5 8 329829.2 215.9 3.34 × 10 −4 29 trans-HONO 14 4 11 -13 4 10 330071.5 181.0 3.52 × 10 −4 29 trans-HONO 14 3 12 -13 3 11 330281.2 153.8 3 -0.5 -0.5 -0.5 -0.5 0 0 0 0 3 3 3 3 0 0 0 0 Rate by comparison with similar DR (Fournier et al 2013;Florescu-Mitchell & Mitchell 2006;Geppert et al 2004) and branching ratios deduced roughly from similar reactions using Plessis et al (2012). The important fact is that HONO is likely non negligible product.…”
Section: Moleculementioning
confidence: 96%
“…19.! HCCCHO + HCO + → HCCCHOH + + CO 1.0 1.2e-9 4.1 3 0 Capture rate, Ionpol1 Fournier et al 2013). Branching ratio deduced from the fact that H 2 C 3 O is not detected.…”
Section: The Chemical Modelmentioning
confidence: 99%
“…The flowing afterglow–Langmuir probe (FALP) apparatus and VENDAMS method have been described in detail previously. , The FALP consists of a 1 m long, 7 cm diameter stainless steel-lined glass flow tube containing a microwave discharge cavity on a 2.5 cm diameter arm at the upstream end. Approximately 13 std.…”
Section: Methodsmentioning
confidence: 99%