Electron correlations in the antiproton energy loss distribution in He

Abstract

We present ab-initio calculations of the electronic differential energy transfer (DET) cross-sections for antiprotons with energies between $3$keV and $1$MeV interacting with helium. By comparison with simulations employing the mean-field description based on the single-active electron approximation we are able to identify electron correlation effects in the stopping and straggling cross sections. Most remarkably, we find that straggling exceeds the celebrated Bohr straggling limit when correlated shake-up processes are included.

References in corpus (5)

• Photoionization in the time and frequency domain
• Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron
• Nonsequential two-photon double ionization of helium
• Fully Correlated Electronic Dynamics for Antiproton Impact Ionization of Helium
• Ionization of helium by slow antiproton impact: total and differential cross sections

Cited by in corpus (2)

• Calculation of Energy Loss in Antiproton Collisions with Many-Electron Systems using Ehrenfest's Theorem
• Interaction of antiproton with helium based on ab-initio calculations