Electron double-emission spectra for Helium atoms in intense 400 nm laser pulses

Abstract

Double photoelectron emission from He atoms by intense laser pulses with a wave length of $394.5nm$ is computed for intensities $3.5-9.2\times 10^{14}W/c{m}^2$. Joint momentum distributions confirm the characteristics seen in classical trajectory calculations. The pronounced transition from back-to-back to side-by-side emission with increasing intensity, the $H{e}^{++}/H{e}^{+}$ ratios, and a modulation of joint energy spectra agree well with a recent experiment [Henrichs et al., PRA 98, 43405 (2018)], if one admits an increase of experimental intensities by a factor $\sim 2$. We find that Freeman resonances enhance anti-correlated emission, we identify the signature of electron repulsion in joint angular distributions, and we interpret the modulation of joint energy spectra as a signature of multiple recollsions.

8 pages, 10 figures

References in corpus (5)

• Photoionization of few electron systems with a hybrid Coupled Channels approach
• Calculation of photoelectron spectra within the time-dependent configuration interaction singles scheme
• A toolkit for semiclassical computations for strongly-driven molecules: "frustrated" ionization of H${}_2$ driven by elliptical laser fields
• Dissociative ionization of H2+ using intense femtosecond XUV laser pulses
• Mixed gauge in strong laser-matter interaction

Cited by in corpus (6)

• Dialogue on analytical and ab initio methods in attoscience
• tRecX -- an environment for solving time-dependent Schrödinger-like problems
• A quantum simulation of dissociative ionization of $H_2^{+}$ in full dimensionality with time dependent surface flux method
• Singularity in electron-core potential as a gateway to accurate multi-electron ionization spectra in strongly driven atoms
• Pulse length effects in long wavelength driven non-sequential double ionization
• Theoretical investigation of the Freeman resonance in the dissociative ionization of $H_2+$