Björn Forsberg

PhD student

Visa sidan på svenska
Works at Department of Biochemistry and Biophysics
Visiting address Tomtebodavägen 23A
Postal address Institutionen för biokemi och biofysik 106 91 Stockholm


Research group: Erik Lindahl


A selection from Stockholm University publication database
  • 2011. Björn Forsberg, Henning Zettergren.

    We are developing a novel classical over-the barrier model for electron transfer from an in nitely thin conducting disc to a point charge projectile to model multiple electron capture in e.g. keV collisions of atomic ions with poly-cyclic aromatic hydrocarbons (PAHs). In its nal form, the present model will incorporate the polarization of the PAH molecules due to the active electron and the point charge projectile at a general angle of incidence. This will drastically improve the description of the potential barrier in comparisons with simpler versions of the model where the nite size and polarizability of the target molecule is neglected or treated in an averaged fashion. In this work we arrive at expressions for the electrostatic potential energy barrier experienced by the active electron in the two spatial orientations where the point charge projectile is located along the normal symmetry axis and in the tangent plane of the disc. Applied to coronene (C24H12) such barriers compare better with high level density functional theory (DFT) calculations than with the results from the simpler versions of the classical over-the-barrier models for atomic and spherical cluster targets. These results thus strongly supports the conducting disc approximation of PAHs. Finally we discuss the nal steps in the model development and possible extensions of the model to include less symmetric elliptical discs or spherical caps.

Show all publications by Björn Forsberg at Stockholm University

Last updated: August 29, 2019

Bookmark and share Tell a friend