1 Erratum to: Eur. Phys. J. A (2021) 57:152 https://doi.org/10.1140/epja/s10050-021-00456-1

Unfortunately, the article contained an error in the affiliations of authors Z. Grujić and A. Schnabel.

In figure 3 the style of two vertical lines was changed from solid to dashed.

This has been corrected now and no other changes to the article have been made. We apologise for any inconvenience caused to our readers.