One of the most significant developments in computational atomic and molecular physics in
recent years has been the introduction of B-spline basis sets in calculations of atomic and …

Resonance ionization spectroscopy, RIS, is a multistep photon absorption process in which
the final state is the ionization continuum of an atom. The RIS process can be saturated with …

For the collisional-radiative model applied to helium, two alternative formulations are
presented in which non-linear process such as ionization due to metastable-metastable …

The book summarizes international progress over the last few decades in upper atmosphere
airglow research. Measurement methods, theoretical concepts and empirical models of a …

The effect of the pulse repetition rate (PRR) on the generation of high energy electrons in a
fast ionization wave (FIW) discharge is investigated by both experiment and modelling. The …

Using high resolution laser photoelectron spectrometry we have determined absolute cross
sections σ J 0 J 1 and the electron angular distribution parameter for one photon ionization …

The absolute photoionization cross sections of the excited, short-lived He* 1 s 2 p P 1 and 1
s 3 p P 1 states are determined experimentally in the region close to the He+ 1 s S 2 …

The field of photoionization is one area of the more general problem of understanding how
radiation interacts with atoms and molecules. For most atoms and molecules photoionization …

The relaxation dynamics of superexcited superfluid He nanodroplets is thoroughly
investigated by means of extreme-ultraviolet (XUV) femtosecond electron and ion …

We analyze several possibilities for precisely measuring electronic transitions in atomic
helium by the direct use of phase-stabilized femtosecond frequency combs. Because the …