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Electron Attachment Sarah, David, Jóhann. Electron attachment MX + e – MX – * Attachment most efficient at low energies 2 FormationDecay MX + e – Autodetachment.

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Presentation on theme: "Electron Attachment Sarah, David, Jóhann. Electron attachment MX + e – MX – * Attachment most efficient at low energies 2 FormationDecay MX + e – Autodetachment."— Presentation transcript:

1 Electron Attachment Sarah, David, Jóhann

2 Electron attachment MX + e – MX – * Attachment most efficient at low energies 2 FormationDecay MX + e – Autodetachment (AD) M + X – Dissociative electron attachment (DEA) Stabilization through IVR MX –# Metastable molecular anion Stabilization through IVR

3 Diatomic modelElectron attachment AE M + X Autodetachment MX – * Electron energy 0 Internuclear distance Potential Energy Franck-Condon region EA M + X – 3 rcrc

4 Diatomic modelElectron attachment AE M + X EA(X) E th BDE(MX) E th = BDE(MX) – EA(X) Dissociative electron attachment (DEA) MX – * Electron energy 0 Potential Energy T H2 ≈ 7.5 fs T D2 ≈ 10.6 fs [1] [1] G. J. Schulz and R. K. Asundi. Phys. Rev., 158(1), (1967), 25. Internuclear distance M + X – EA 4 rcrc

5 Diatomic modelElectron attachment Stabilization through intramolecular vibrational energy redistribution (IVR) Redistribution of energy to vibrational modes not relevant for AD Electron energy 0 Internuclear distance MX – MX Potential Energy 5

6 Electron trappingElectron attachment Shape resonances Electron-molecule distance l > 0 V tot (eV) TNI formed through electron trapping within a centrifugal barrier 6

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