We investigate the influence of relativistic nondipole effects on photoelectron spectra argon, particularly in low kinetic energy region (0 eV - 5 eV). In our experiment, we use intense linearly polarised 800 nm laser pulse to ionise Ar from a jet and record momentum distributions using reaction microscope (REMI). Our measurements show that effect can cause an energy-dependent asymmetry along p...

The kinetic Boltzmann equation is used to model the non-equilibrium ionization phase that initiates the evolution of atomic clusters irradiated with single pulses of intense vacuum ultraviolet radiation. The duration of the pulses is ≤ 50 fs and their intensity in the focus is ≤ 10 14 W/cm 2. This statistical model includes various processes contributing to the sample dynamics at this particula...

The impact ionization rate and its orientation dependence in k space is calculated for ZnS. The numerical results indicate a strong correlation to the band structure. The use of a q-dependent screening function for the Coulomb interaction between conduction and valence electrons is found to be essential. A simple fit formula is presented for easy calculation of the energy dependent transition r...