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** Chemical reaction rate coefficients **

The Treanor effect (3-165) can be applied for isotope separation in plasma (Belenov et al., 1973). The ratio of rate coefficients of chemical reactions for two different vibrationally excited isotopes (v = V ), called the coefficient of selectivity, can be expressed as [Pg.125]

Contribution of Methyl Radicals (CH3) and Acetylene (C2H2) in Non-Equilibrium Plasma-Chemical Deposition of Diamond Films. Taking into accormt the reaction rate coefficients of attachment of methyl radicals (9-117) and acetylene (9-118) to the diamond fihn surface as well as typical molar fractions of CH3 radicals and C2H2 (see Table 9-23), calculate the relative contribution of these major active carbon-containing chemical species to the deposition of diamond films from a H2-CH4 mixture in non-equilibrium plasma conditions. [Pg.675]

The formula can be applied in the case of IXeEaT /hcoTo < 1, where hco and Xe are the vibrational quantum and anharmonicity coefficient of N2 molecules. Compare the rate coefficient (6-34) for NO synthesis stimulated by vibrational excitation with that of CO2 dissociation (see Section 5.2). Because NO synthesis represents the slow reaction, the rate coefficient (6-34) includes detailed characteristics of the elementary process in contrast to the case of fast reaction in plasma-chemical CO2 dissociation. For calculations of the rate coefficient using equation (6-34) at typical non-equilibrium plasma conditions (T 3000 K, To < 1000 K), one can take the pre-exponential factor Ao = 10 -10 cm°/s. [Pg.368]

** Chemical reaction rate coefficients **

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