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1 Electron collisions with a radical: NO ·. 2 Electron – Driven Chemistry - Outer space - Ionosphere: northern light etc. - Industrial plasmas - semiconductor.

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Presentation on theme: "1 Electron collisions with a radical: NO ·. 2 Electron – Driven Chemistry - Outer space - Ionosphere: northern light etc. - Industrial plasmas - semiconductor."— Presentation transcript:

1 1 Electron collisions with a radical: NO ·

2 2 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

3 3 Radicals in plasmas: CF 4 + e –  CF 3 · + F · + e – Prototype radical: NO · spin – orbit coupling

4 4

5 5

6 6 Differential cross sections in N 2 O Marinković B, Szmytkowski C, Pejčev V, Filipović D and Vuškoviš L, J. Phys. B (1986) Johnstone W M and Newell W R, J. Phys. B (1993) Kitajima M, Sakamoto Y, Gulley R J, Hoshino M, Gibson J C, Tanaka H and Buckman S J, J. Phys. B (2000)

7 7 Electron energy loss spectrum: states of the neutral molecule

8 8 Excitation function: RESONANCES (states of the negative ion) Phys. Rev. Lett. 2004, 93,

9 9 NO: Potential Curves initial NOfinal NONO – resonance

10 10 Comparison of NO and O 2 NOO2O2

11 11 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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