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Electron correlations in the antiproton energy loss distribution in He

Authors :
Borbély, S.
Tong, X. -M.
Nagele, S.
Feist, J.
Březinová, I.
Lackner, F.
Nagy, L.
Tőkési, K.
Burgdörfer, J.
Source :
Physical Review A 98, 012707 (2018)
Publication Year :
2019

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.

Subjects

Subjects :
Physics - Atomic Physics

Details

Database :
arXiv
Journal :
Physical Review A 98, 012707 (2018)
Publication Type :
Report
Accession number :
edsarx.1901.10212
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevA.98.012707