Hannover 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
A: Fachverband Atomphysik
A 8: Poster I
A 8.42: Poster
Dienstag, 9. März 2010, 16:30–19:00, Lichthof
Electron Dynamics of F2− in a Strong Laser Field. — •Hannes Hultgren and Igor Kiyan — Albert-Ludwig University, Faculty of Mathematics and Physics, D-79104 Freiburg, Germany
F− and F2− are exposed to a strong, infrared laser pulse of linear polarization. An electron imaging spectrometer operated in the velocity mapping regime is used to record angular resolved photoelectron spectra. Both F− and F2− spectra are recorded during the same run of experiment. The spectra exhibit a non-monotonic structure, which is associated with the quantum interference effect predicted by a Keldysh-like theory [1]. The character of this structure is similar in both spectra and it corresponds to detachment of an initially bound p-electron. However, the energy distribution of F2− extends to higher kinetic energies than the energy distribution of F−.
Two different models are considered for the data interpretation. One of these assumes photodissociation of F2− at the leading front of the laser pulse, followed by photodetachment of F− created in the photodissociation step. Another model involves simulations based on the theory presented in [2], which uses the molecular strong-field approximation.
[1] G.F Gribakin and M.Yu. Kuchiev, Phys. Rev. A, 55, 3760 (1997).
[2] D.B. Milosević, Phys. Rev. A, 74, 063404 (2006)