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Electron collisions with a radical:

NO·

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Electron – Driven Chemistry- Outer space

- Ionosphere: northern light etc.

- Industrial plasmas- semiconductor manufacture

- flat displays- plasma displays- LCD display manufacture- back-lighting: Xe excimer

- surface modification- hydrophilic- hydrophobic- shrink-proof wool- milk packaging- …

- waste disposal- satellite engines

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Radicals in plasmas: CF4 + e– CF3 · + F

· + e–

Prototype radical: NO ·

spin – orbit coupling

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Differential cross sections in N2O

Marinković B, Szmytkowski C, Pejčev V, Filipović D and Vuškoviš L,J. Phys. B 19 2365 (1986)

Johnstone W M and Newell W R, J. Phys. B 26 129 (1993)

Kitajima M, Sakamoto Y, Gulley R J, Hoshino M, Gibson J C, Tanaka H and Buckman S J, J. Phys. B 33 1687 (2000)

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Electron energy loss spectrum:states of the neutral molecule

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Excitation function: RESONANCES (states of the negative ion)

Phys. Rev. Lett. 2004, 93, 063201

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NO: Potential Curves

initial NO final NONO– resonance

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Comparison of NO and O2

NO O2

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Conclusions

NO·: transitions between electronic fine structure states

- small cross section for direct (nonresonant) excitation

- gigantic cross section for resonant excitation, elastic

- resonance parentage

- energetic relation

(- elastic cross sections not equal?)

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