[en] The data on total disintegration of lead with magnetism nuclei at 4.5 A GeV/c momentum are presented. The comparison of these data with those on lead total disintegration by carbon nuclei at the same momentum per nucleon is made. The growth of the number of single charged relativistic particles, strengthening of the collimation of charged secondary emission, increasing of opposite side emission of produced and target destruction particles in the azimuthal plane, strengthening of side splash of these particles with growing mass of a nucleus-projectile are observed. An event with a high density of produced particles per pseudorapidity interval ∼ 100 has been registered. The probability of random appearance of this event is equal to 10^-2. Comparison with cascade-evaporation model is made