Phenomenological critical interaction distance from elastic scattering measurements on a 208Pb target V. Guimarães, J. Lubian, J. J. Kolata, E. F. Aguilera, M. Assunção and V. Morcelle Eur. Phys. J. A, 54 12 (2018) 223 Published online: 19 December 2018 DOI: 10.1140/epja/i2018-12662-7