Two and three-photon double ionization of lithium

28th International Conference on Photonic, Electronic and Atomic Collisions

Schuricke, Michael^1 ; Dornes, Christian^1 ; Armstrong, Gregory^2 ; Colgan, James^2 ; Kheifets, Anatoli^3 ; Ullrich, Joachim^1,4 ; Dorn, Alexander^1

Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, Heidelberg

D-69117, Germany^1

Theoretical Division, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^2

Research School of Physics and Engineering, Australian National University, Canberra, Australia^3

Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig

D-38116, Germany^4

关键词: Close coupling calculation;    Double ionization;    Photon energy;    Photon transition;    Simultaneous absorption;    Three-photon;    Two photon;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032032/pdf
DOI  :  10.1088/1742-6596/488/3/032032

来源: IOP

【 摘 要 】

Differential studies on two and three-photon double ionization (DI) of atomic lithium have been performed for photon energies of 50 eV and 59 eV at I ≈ 5 × 1013W/cm2. At 50 eV DI proceeds via the simultaneous absorption of two photons resulting in the correlated emission of two electrons. In contrast for a photon energy of 59 eV, the resonant one photon transition (1s → 2p) is followed by DI through a second photon. Additionally a competing sequential three photon reaction is observed for both energies. The experimental data is compared with results from non-perturbative close-coupling calculations.