Search results

Search:
in the keywords: Multiphoton ionization

Sort By:

Limit search:

Above-threshold ionization of hydrogen and hydrogen-like ions by X-ray pulses

100%

Bachau H., Budriga O., Dondera M., Florescu V.

Open Physics

2013

vol. 11

issue 9

1091-1098

This paper adresses the problem of above-threshold ionization (ATI) of hydrogen interacting with an intense X-ray electromagnetic field. Two approaches have been used. In the first approach, we calculate generalized differential and total cross sections based on second-order perturbation theory for the electron interaction with a monochromatic plane wave, with the A 2 and A · P contributions from the nonrelativistic Hamiltonian (including retardation) treated exactly. In the second approach, we solve the time-dependent Schrödinger equation (TDSE) for a pulsed plane wave using a spectral approach with a basis of oneelectron orbitals, calculated with L 2-integrable B-spline functions for the radial coordinate and spherical harmonics Y lm for the angular part. Retardation effects are included up to O(1/c), they induce extra terms forcing the resolution of the TDSE in a three dimensional space. Relativistic effects [of O (1/c 2)] are fully neglected. The isoelectronic series of hydrogen is explored in the range Z = 1 − 5 in both TDSE and perturbative approaches. Photoelectron angular distributions are obtained for photon energies of 1 keV and 3 keV for hydrogen, and photon energy of 25 keV for the hydrogenic ion B4+. Perturbative and TDSE calculations are compared.

Refine search results

1 Open Physics

1 2013

1 Bachau H.

1 Budriga O.

1 Dondera M.

1 Florescu V.

Search results

Above-threshold ionization of hydrogen and hydrogen-like ions by X-ray pulses