Double photoionization of Helium

Double Photoionization of Magnesium From Threshold to 54 eV

Direct double photoionization of atoms in which two electrons are simultaneously emitted is of high interest for understanding electron correlations. Many investigations of double photoionization have focused on helium -the textbook example for double ionization with its two electrons. Double-photoionization experiments on atoms beyond He are still sparse and often less sophisticated due to the...

Hyperspherical partial wave calculation for double photoionization of the helium atom at 20 eV excess energy

Hyperspherical partial wave approach has been applied here in the study of double photoionization of the helium atom for equal energy sharing geometry at 20 eV excess energy. Calculations have been done both in length and velocity gauges and are found to agree with each other, with the CCC results and with experiments and exhibit some advantages of the corresponding three particle wave function...

Time-dependent close-coupling calculations of correlated photoionization processes in helium

Various correlated photoionization processes in helium are calculated by direct solution of the timedependent Schrödinger equation. An inhomogeneous set of time-dependent close-coupled partial differential equations are partitioned on a numerical lattice for easy implementation on massively parallel computers. Projection of the time evolved wave function onto lattice eigenstates for He yields c...

Comment on "Measurement of the ratio of double-to-single photoionization of helium at 2.8 keV using synchrotron radiation"

Double photoionization of helium including quadrupole radiation effects

Non-perturbative time-dependent close-coupling calculations are carried out for the double photoionization of helium including both dipole and quadrupole radiation effects. At a photon energy of 800 eV, accessible at current synchrotron light sources, the quadrupole interaction contributes around 6% to the total integral double photoionization cross section. The pure quadrupole single energy di...