Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Poster: Photoionization

A 21.2: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

Photoelectrons below the low-energy structure — •Elias Diesen, Ulf Saalmann, and Jan-Michael Rost — MPI-PKS, Dresden, Germany

Only recently the LES was discovered, a pronounced structure in the low energy photoelectron spectrum resulting from the interaction with a high intensity infrared laser pulse [1]. As shown in [2,3], the LES can be understood classically as an energy bunching effect due to the Coulomb field of the parent ion in so-called soft recollisions. Motivated by new experimental results [4,5] we have investigated the dynamics very close to threshold which reveals a rich structure of the spectrum below the LES.

[1] Blaga et al, Nature Phys., 5, 335 (2009)

[2] Kästner et al, Phys. Rev. Lett. 108, 033201 (2012)

[3] Kästner et al, J. Phys. B 45, 074011 (2012)

[4] Wu et al, Phys. Rev. Lett. 109, 043001 (2012)

[5] Moshammer, private communication