Strong field photoelectron holography has been proposed as a means for interrogating the spatial and temporal information of electrons and ions in a dynamic system. After ionization, part of the electron wave packet may directly go to the detector (the reference wave), while another part may be driven back and scatters off the ion(the signal wave). The interference hologram of the two waves may...

We investigate photon-momentum sharing between an electron and an ion following different photoionization regimes. We find very different partitioning of the photon momentum in one-photon ionization (the photoelectric effect) as compared to multiphoton processes. In the photoelectric effect, the electron acquires a momentum that is much greater than the single photon momentum ℏω/c [up to (8/5) ...

The effect of hydration on the vertical ionization energy (VIE) of thymine was characterized using equation-of-motion ionization potential coupled-cluster (EOM-IP-CCSD) and effective fragment potential (EFP) methods. We considered several microsolvated clusters as well as thymine solvated in bulk water. The VIE in bulk water was computed by averaging over solvent-solute configurations obtained ...

The quadrupole channel of two-photon double ionization of He exhibits two distinctly different modes of correlated motion of the photoelectron pair. The kinematics of the mode associated with the center-of-mass motion favors large total momenta maximized at parallel emission where the interelectron repulsion is strong. In contrast, the mode associated with the relative motion favors large relat...

A theory describing above-threshold ionization of atoms and ions in a strong electromagnetic field is presented. It is based on the widely known strong field approximation and incorporates the Coulomb interaction between the photoelectron and the nucleus using the method of complex classical trajectories. A central result of the theory is the Coulomb-corrected ionization amplitude whose evaluat...

We discuss the use of uncorrelated final state wave functions in calculations of double ionization processes. We show that in some physical situations such a simplified treatment can provide meaningful results. In particular, the prevalence of back-to-back emission in two-photon double ionization and even energy sharing between the photoelectrons make it possible to use uncorrelated final state...

We present and analyze results of ab initio computations of nonsequential double ionization of the hydrogen molecule in a few-cycle intense laser pulse. To this end, we have used a model of planar molecules with static nuclei, in which the electronic center-of-mass motion is restricted along the polarization direction of the linearly polarized laser. Alignment of the internuclear axis parallel ...

Development of ECR ion source has demonstrated that, as the empirical scaling laws summarized, higher magnetic field with higher operation frequency will greatly improve the source performance. Based on the great success of SECRAL at IMP, a higher-magnetic-field SC ECRIS is planned to meet the new accelerator demands. However, there are many practical issues in the design and construction of a ...

We present convergent-close-coupling CCC calculations of the angular anisotropy parameters 2 , 4 and the recoil ion momentum distribution d /dp in two-photon double ionization TPDI of helium. In a stark contrast to single-photon double ionization SPDI , where the 2 parameter varies widely changing the angular distribution from isotropic to nearly dipole for slow and fast photoelectrons, respect...