dorsal/arxiv
View SchemaR-matrix calculation of electron collisions with electronically excited O2 molecules
| Authors | Motomichi Tashiro, Keiji Morokuma, Jonathan Tennyson |
|---|---|
| Categories | |
| ArXiv ID | physics/0604098 |
| URL | https://arxiv.org/abs/physics/0604098 |
| DOI | 10.1103/PhysRevA.73.052707 |
| Journal | Phys.Rev.A73:052707,2006 |
Abstract
Low-energy electron collisions with O$_2$ molecules are studied using the fixed-bond R-matrix method. In addition to the O$_2$ ${X}^3\Sigma_{g}^-$ ground state, integrated cross sections are calculated for elecron collisions with the ${a}^1\Delta_{g}$ and ${b}^1\Sigma_{g}^+$ excited states of O$_2$ molecules. 13 target electronic states of O$_2$ are included in the model within a valence configuration interaction representations of the target states. Elastic cross sections for the ${a}^1\Delta_{g}$ and ${b}^1\Sigma_{g}^+$ excited states are similar to the cross sections for the ${X}^3\Sigma_{g}^-$ ground state. As in case of excitation from the ${X}^3\Sigma_{g}^-$ state, the O$_2^-$ $\Pi_u$ resonance makes the dominant contribution to excitation cross sections from the ${a}^1\Delta_{g}$ and ${b}^1\Sigma_{g}^+$ states. The magnitude of excitation cross sections from the ${a}^1\Delta_{g}$ state to the ${b}^1\Sigma_{g}^+$ state is about 10 time larger than the corresponding cross sections from the ${X}^3\Sigma_{g}^-$ to the ${b}^1\Sigma_{g}^+$ state. For this ${a}^1\Delta_{g}$ $\to$ ${b}^1\Sigma_{g}^+$ transition, our cross section at 4.5 eV agrees well with the available experimental value. These results should be important for models of plasma discharge chemistry which often requires cross sections between the excited electronic states of O$_2$.
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"abstract": "Low-energy electron collisions with O$_2$ molecules are studied using the\nfixed-bond R-matrix method. In addition to the O$_2$ ${X}^3\\Sigma_{g}^-$ ground\nstate, integrated cross sections are calculated for elecron collisions with the\n${a}^1\\Delta_{g}$ and ${b}^1\\Sigma_{g}^+$ excited states of O$_2$ molecules. 13\ntarget electronic states of O$_2$ are included in the model within a valence\nconfiguration interaction representations of the target states. Elastic cross\nsections for the ${a}^1\\Delta_{g}$ and ${b}^1\\Sigma_{g}^+$ excited states are\nsimilar to the cross sections for the ${X}^3\\Sigma_{g}^-$ ground state. As in\ncase of excitation from the ${X}^3\\Sigma_{g}^-$ state, the O$_2^-$ $\\Pi_u$\nresonance makes the dominant contribution to excitation cross sections from the\n${a}^1\\Delta_{g}$ and ${b}^1\\Sigma_{g}^+$ states. The magnitude of excitation\ncross sections from the ${a}^1\\Delta_{g}$ state to the ${b}^1\\Sigma_{g}^+$\nstate is about 10 time larger than the corresponding cross sections from the\n${X}^3\\Sigma_{g}^-$ to the ${b}^1\\Sigma_{g}^+$ state. For this\n${a}^1\\Delta_{g}$ $\\to$ ${b}^1\\Sigma_{g}^+$ transition, our cross section at\n4.5 eV agrees well with the available experimental value. These results should\nbe important for models of plasma discharge chemistry which often requires\ncross sections between the excited electronic states of O$_2$.",
"arxiv_id": "physics/0604098",
"authors": [
"Motomichi Tashiro",
"Keiji Morokuma",
"Jonathan Tennyson"
],
"categories": [
"physics.chem-ph",
"astro-ph"
],
"doi": "10.1103/PhysRevA.73.052707",
"journal_ref": "Phys.Rev.A73:052707,2006",
"title": "R-matrix calculation of electron collisions with electronically excited O2 molecules",
"url": "https://arxiv.org/abs/physics/0604098"
},
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