Abstract
The power value of the A-dependence of the cross-section for 4.5 GeV/nucleon deuteron fragmentation into cumulative pions has been measured on carbon, aluminium, copper and lead nuclei for cumulative numbers within 0.8-1.2. The mean value is equal to 0.27 ± 0.09 in this interval. The target atomic weight dependence significantly differs from the volume type dependence on the atomic weight of fragmenting nucleus.
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