Energy and Angular Distribution of Electrons Ejected from Hydrogen and Helium Gas by Protons

Energy and Angular Distribution of Electrons Ejected from Argon by 5-keV to 1.5-MeV Protons

Angular distribution in two-photon double ionization of helium by intense attosecond soft X-ray pulses

Abstract We investigate two-photon double ionization of helium by intense (≈ 1015 W/cm2) ultrashort (≈ 300 as) soft X-ray pulses (E = 91.6 eV). The time-dependent two-electron Schrödinger equation is solved using a coupled channel method. We show that for ultrashort pulses the angular distribution of ejected electrons depends on the pulse duration and provides novel insights into the role of el...

Photodouble ionization dynamics for fixed-in-space H2.

The Coulomb explosion of the hydrogen molecule, after absorption of a 76 eV photon, has been studied by momentum imaging the two electrons and the two protons. Absolute fully differential cross sections of high statistical quality are obtained. A subset of the overall data, namely, equal electron-energy sharing, is used to investigate the effects of molecular orientation on the photoelectron an...

Two-photon double ionization of the hydrogen molecule

Cross sections for the removal of both electrons of the hydrogen molecule by two photons are presented at 30 eV photon energy using the time-dependent close-coupling method. Our approach allows detailed information about the dynamics of the ionization process to be extracted, including angular distributions for the outgoing electrons. Analysis of our calculations reveals some similarities to th...

Cross Sections for Singly Differential and Total Ionization of Helium by Electron Impact

The binary-encounter dipole ~BED! model for electron-impact ionization is applied to helium using the continuum dipole oscillator strength calculated from the relativistic random-phase approximation. The resulting total ionization cross section agrees with available experimental data well within the quoted experimental uncertainties. The singly differential (5energy distribution of ejected elec...