In our presentation of available data on straggling cross sections for protons and antiprotons in helium (Fig. 8), we have inadvertently omitted the experimental data by Besenbacher et al.  for protons and more recent improvements [2,3] of the original binary collision model , which now include screening and shell corrections. Therefore, the paper should be corrected as follows: (1) Figure 8 and its caption are updated. (2) The last paragraph on p. 9 should read as: "The analytic theory by Sigmund  also predicts a monotonic increase towards TB for p whereas for the charge-conjugate projectile p this limit is approached from above and displays a peak around 20 keV. The peak is significantly reduced and shifted to higher projectile energies when effects of multiple Bohr oscillators and of shell and screening corrections are included in the binary theory formalism [2,3]. The enhanced straggling for p originates from the combined effects of the Barkas contribution (∼Z3p)  and the charge-transfer channel absent for p." (3) The list of references is amended. None of the results and conclusions of the original paper are affected by these changes. We thank Professor P. Sigmund for bringing this oversight to our attention and for providing us with the numerical data for the corrected binary theory. (Figure Presented).
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics