53 citations · 439 across the 31 of their papers we have counts for
7 papers · 1 filter
Atomic photoexcitation as a tool for probing purity of twisted light modes
R. P. Schmidt, S. Ramakrishna, A. A. Peshkov +4
The twisted light modes used in modern atomic physics experiments can be contaminated by small admixtures of plane wave radiation. Although these admixtures hardly reveal themselve…
Delbrück scattering above the pair production threshold: Going beyond the Born approximation
J. Sommerfeldt, V. A. Yerokhin, A. Surzhykov
We present a theoretical method to calculate Delbrück scattering amplitudes for photon energies above the electron-positron pair production threshold. The method is based on the ap…
Calculation of isotope shifts and King plot nonlinearities in Ca
Anna V. Viatkina, Vladimir A. Yerokhin, Andrey Surzhykov
Many-body perturbation theory is implemented in order to calculate the isotope shifts of , , , , and energy levels of Ca, for even…
Excitation of forbidden electronic transitions in atoms by Hermite-Gaussian modes
Anton A. Peshkov, Elena Jordan, Markus Kromrey +3
Photoexcitation of trapped ions by Hermite-Gaussian (HG) modes from guided beam structures is proposed and investigated theoretically. In particular, simple analytical expressions…
K-shell ionization of heavy hydrogen-like ions
O. Novak, R. Kholodov, A. Surzhykov +2
A theoretical study of the K-shell ionization of hydrogen-like ions, colliding with bare nuclei, is performed within the framework of the time-dependent Dirac equation. Special emp…
Ionization in a laser assisted ion-ion collision
O. Novak, R. Kholodov, A. N. Artemyev +2
The ionization of a hydrogen-like heavy ion by impact of a charged projectile under simultaneous irradiation by a short laser pulse is investigated within the non-perturbative appr…