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9 papers · 2 filters
Attosecond time-scale multi-electron collisions in the Coulomb four-body problem: traces in classical probability densities
Agapi Emmanouilidou, Jan Michael Rost
In the triple ionization of the Li ground state by single photon absorption the three electrons escape to the continuum mainly through two collision sequences with individual colli…
Optimal Stochastic Enhancement of Photoionization
Kamal P. Singh, Jan M. Rost
The effect of noise on the nonlinear photoionization of an atom due to a femtosecond pulse is investigated in the framework of the stochastic Schrödinger equation. A modest amount…
An {\it ab initio} relativistic coupled-cluster theory of dipole and quadrupole polarizabilities: Applications to a few alkali atoms and alkaline earth ions
B. K. Sahoo
We present a general approach within the relativistic coupled-cluster theory framework to calculate exactly the first order wave functions due to any rank perturbation operators. U…
Theoretical studies of the atomic transitions in boron-like ions: Mg VIII, Si X and S XII
H. S. Nataraj, B. K. Sahoo, B. P. Das +2
In this paper, we have carried out the calculations of the weighted oscillator strengths and the transition probabilities for a few low-lying transitions of boron-like ions: Mg VII…
Photoionization of helium-like ions in asymptotic nonrelativistic region
A. I. Mikhailov, A. V. Nefiodov, G. Plunien
The cross section for single K-shell ionization by a high-energy photon is evaluated in the next-to-leading order of the nonrelativistic perturbation theory with respect to the ele…
Nonrelativistic double photoeffect on lithiumlike ions at high energies
A. I. Mikhailov, I. A. Mikhailov, A. V. Nefiodov +1
The total cross section for double ionization of lithiumlike ions by a high-energy photon is calculated in leading order of the nonrelativistic perturbation theory. The partial con…