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Hannover 2010 – scientific programme

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A: Fachverband Atomphysik

A 8: Poster I

A 8.42: Poster

Tuesday, March 9, 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)

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