Photoionization from excited Mg atoms

Calculation of the Photoionization Cross Sections of Excited Levels of Rare Gas Atoms

The photoionization of excited hydrogen atom in plasmas

a r t i c l e i n f o a b s t r a c t The photoionization processes of excited hydrogen atoms in plasma environments are investigated using the method of complex coordinate rotation. The standard Debye–Hückel model and modified Debye– Hückel model are adopted to describe the plasma screening effects. The photoionization cross sections of plasma-embedded excited hydrogen atoms varied with differ...

Measurement of the Rb„5D5Õ2... photoionization cross section using trapped atoms

We report on measurements of the cross section for photoionization of Rb atoms in the highly excited 5D5/2 level at wavelengths ranging from 1064 to 532 nm ~photoelectron energies of 0.175 to 1.34 eV!. We efficiently populate the 5D5/2 level using coherent two-photon excitation of trapped atoms with pulses in the counterintuitive order. The absolute photoionization cross sections are then measu...

B-spline-based complex-rotation method with spin-dependent interaction

We present a B-spline-based complex rotation (BSCR) method with spin-dependent interaction for the study of atomic photoionization leading to multiple ionization channels dominated by doubly excited resonances for two-electron and divalent atoms. The degree of mixing between different spin states and between the bound and continuum components of the state function of the resonance state can be ...

B-spline-based multichannel K-matrix method for atomic photoionization

We present a B-spline-based multichannel K-matrix method following an extension from a B-spline-based configuration-interaction approach. Theoretical procedures are presented in detail for its application to photoionization from two-electron and divalent ~e.g., alkaline-earth! atoms. Numerical examples, including doubly excited photoionization spectra above the N52 threshold from the He 1s2s S ...