Attosecond Time Delay in Photoemission and Electron Scattering near Threshold
MetadataShow full item record
© 2016 American Physical Society.We study the time delay in the primary photoemission channel near the opening of an additional channel and compare it with the Wigner time delay in elastic scattering of the photoelectron near the corresponding inelastic threshold. The photoemission time delay near threshold is significantly enhanced, to a measurable 40 as, in comparison to the corresponding elastic scattering delay. The enhancement is due to the different lowest order of interelectron interaction coupling the primary and additional photoemission channels. We illustrate these findings by considering photodetachment from the H- negative ion, and compare it with electron scattering on the hydrogen atom near the first excitation threshold. Other threshold processes of atomic photoionization and molecular photofragmentation, where photoemission time delay is enhanced, are identified. This opens the possibility of studying threshold behavior utilizing attosecond chronoscopy.
Showing items related by title, author, creator and subject.
Utamuratov, Ravshanbek (2010)This thesis presents the theoretical studies of positron scattering on the helium atom using two-center Convergent Close-Coupling (CCC) theory.The thesis organized in the following way: In the Introduction (Chapter I) the ...
Dwivedi, D.; Lepkova, Katerina; Becker, T. (2017)Carbon steel is a preferred construction material in many industrial and domestic applications, including oil and gas pipelines, where corrosion mitigation using film-forming corrosion inhibitor formulations is a widely ...
Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180°Weyland, M.; Ren, X.; Pflüger, T.; Baek, W.; Bartschat, K.; Zatsarinny, O.; Fursa, Dmitry; Bray, Igor; Rabus, H.; Dorn, A. (2014)We use an improved target recoil momentum spectroscopy setup to determine differential cross sections for excited metastable state production in atoms and molecules by electron impact and show its capabilities for an ...