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The data file AMJUEL: Additional Atomic and Molecular ... - eirene

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2.5 Reaction 2.2.17 e + H2 → e + H2(v) → H + H −<br />

Effective dissociative attachment rate.<br />

⟨σv⟩eff = ⟨σv⟩H2(ν=0) + ∑ 14<br />

ν=1⟨σv⟩H2(ν) · pH2(ν)<br />

Vibrational distribution pH2(ν, Te) (vs. Te) taken into account. Only coupling to H2 ground<br />

state. No population of H2(ν) from electronically excited H ∗ 2, no radiative transitions between<br />

vibrational levels. Assume: incident H2 particle with 0.1 eV <strong>and</strong> Ti = Te, hence: density<br />

independent vibrational distribution <strong>and</strong> effective rate.<br />

Competing processes: see ion conversion, below, <strong>and</strong> contribution to dissociation via vibrational<br />

states, i.e., enhanced transition into repulsive triplett 3 b.... state.<br />

b0 -2.278396332892D+01 b1 8.634828071751D-01 b2 -1.686619409809D+00<br />

b3 4.392288378207D-01 b4 -4.393128035945D-01 b5 2.640299048385D-01<br />

b6 -6.748601049114D-02 b7 7.753368735736D-03 b8 -3.328288267126D-04<br />

Max. rel. Error: 11.6159 %<br />

Mean rel. Error: 5.8452 %<br />

2.6 Reaction 3.2.3 p + H2 → H + H + 2<br />

Effective ion conversion rate (charge exchange on H2)<br />

⟨σv⟩eff = ⟨σv⟩H2(ν=0) + ∑ 14<br />

ν=1⟨σv⟩H2(ν) · pH2(ν)<br />

Same vibrational distribution (as function of Te) as above. <strong>The</strong>refore: single parameter fit<br />

vs. Te, since vibrational distribution does not depend upon density, E0 is fixed (0.1 eV) <strong>and</strong><br />

Tp = Te = T .<br />

b0 -2.163099643422D+01 b1 3.206843053514D+00 b2 -3.369939911269D+00<br />

b3 1.290238400703D+00 b4 -3.988189754178D-01 b5 1.462287796966D-01<br />

b6 -3.524154596754D-02 b7 4.146324082808D-03 b8 -1.846022446828D-04<br />

Max. rel. Error: 10.2031 %<br />

Mean rel. Error: 6.3799 %<br />

Competing process at low T: see above: dissociative electron attachment, process 2-2-17<br />

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