Physics – Atomic Physics
Scientific paper
2011-10-06
Physics
Atomic Physics
5 pages, 5 figures, 1 table
Scientific paper
We theoretically study the pulse-width dependence of the photoelectron angular distribution (PAD) from the resonance-enhanced two-photon single ionization of He by femtosecond ($\lesssim 20$ fs) extreme-ultraviolet pulses, based on the time-dependent perturbation theory and simulations with the full time-dependent Schr\"odinger equation. In particular, we focus on the competition between resonant and nonresonant ionization paths, which leads to the relative phase $\delta$ between the $S$ and $D$ wave packets distinct from the corresponding scattering phase shift difference. When the spectrally broadened pulse is resonant with an excited level, the competition varies with pulse width, and, therefore, $\delta$ and the PAD also change with it. On the other hand, when the Rydberg manifold is excited, $\delta$ and the PAD do not much vary with the pulse width, except for the very short pulse regime.
Ishikawa Kenichi L.
Ueda Kiyoshi
No associations
LandOfFree
Competition of resonant and nonresonant paths in resonance-enhanced two-photon single ionization of He by an ultrashort extreme-ultraviolet pulse does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Competition of resonant and nonresonant paths in resonance-enhanced two-photon single ionization of He by an ultrashort extreme-ultraviolet pulse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Competition of resonant and nonresonant paths in resonance-enhanced two-photon single ionization of He by an ultrashort extreme-ultraviolet pulse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-180779