Article révisé par les pairs
Résumé : The evidence concerning the region of the nucleus in which the capture of K- mesons in K mesonic atoms predominantly occurs is re-examined in the light of a recent criticism. It is concluded that capture in the extreme peripheral region where the nuclear density is of the order of 5 per cent of the the central density and the existence of a neutron halo in heavy nuclei remain the most probable interpretation of the available data. © 1969.