Analytical description of mirror plot in insulating target N. Ghorbel, A. Kallel, G. Damamme, R. Renoud and Z. Fakhfakh Eur. Phys. J. Appl. Phys., 36 3 (2006) 271-279 Published online: 15 November 2006 DOI: 10.1051/epjap:2006130