Multielectron effects in strong-field ionization of CO2: Impact on differential photoelectron spectra
| Autor: | Vinay Pramod Majety, Armin Scrinzi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Above threshold ionization Ab initio Photoionization Polarization (waves) 01 natural sciences Spectral line 010305 fluids & plasmas Wavelength Ionization 0103 physical sciences Physics::Atomic and Molecular Clusters Physics::Atomic Physics Atomic physics 010306 general physics Order of magnitude |
| Zdroj: | Physical Review A |
| Popis: | We report fully differential photoelectron spectra from an ab initio coupled-channels treatment of ${\mathrm{CO}}_{2}$. Photoionization by laser pulses centered at wavelengths of 400 and 800 nm is considered, with arbitrary molecular alignment and polarization (linear and elliptic). Calculations reveal significant excited-state channel contributions that are, at certain molecular orientations, an order of magnitude larger than the ground-state channel in the rescattering plateau. A partial washout of the multiphoton structure in the above threshold ionization spectra and of the nodal features in angle-resolved spectra is observed due to ionization to excited-state channels. The qualitative nature of the spectra is determined by ionization thresholds, orbital symmetries, and interchannel coupling, in order of precedence. |
| Databáze: | OpenAIRE |
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