2014/04/30 by V. V. Flambaum, M. G. Kozlov, G. F. Gribakin · 1 citation
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic physics #Chemistry #Electron #Electron scattering #Ion #Ionization #Laser-Matter Interactions and Applications #Molecular physics #Photoionization #Photon #Physics #Quantum mechanics #Raman scattering #Raman spectroscopy #Recombination #Resonance (particle physics) #Scattering #Spectroscopy and Quantum Chemical Studies #X-ray Raman scattering #physics.atom-ph #physics.chem-ph #quant-ph
paper · pdf · doi:10.1103/physreva.91.052704
published as Phys. Rev. A 91, 052704 (2015)
openalex publication_date 2015/05/12 · arxiv created 2015/05/13 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In open-shell atoms and ions, processes such as photoionization, combination (Raman) scattering, electron scattering, and recombination are often mediated by many-electron compound resonances. We show that their interference (neglected in the independent-resonance approximation) leads to a coherent contribution, which determines the energy-averaged total cross sections of electron- and photon-induced reactions obtained using the optical theorem. In contrast, the partial cross sections (e.g., electron recombination or photon Raman scattering) are dominated by the stochastic contributions. Thus, the optical theorem provides a link between the stochastic and coherent contributions of the compound resonances. Similar conclusions are valid for reactions via compound states in molecules and nuclei.