Abstract
We present results based on an analysis of alpha-emulsion interactions at 12.4A GeV. The multiplicity distributions of shower particles in the restricted rapidity intervals are well described by negative binomial distributions (NBD). The behaviour of parameters [Formula: see text] and 1/k of the NBD with increasing Δy in the backward hemisphere is quite different from that found in elementary collisions. Star size dependence is also investigated. An attempt has been made to interpret the results in the framework of a clan model. In the forward hemisphere the average decay multiplicity of clans is small [Formula: see text] and seems to be target-independent, whereas bigger clans are produced in the backward hemisphere and their sizes seem to depend on the target size. Also the average number of clans in the backward hemisphere is less than that in the forward hemisphere and shows target size dependence. Clans seem to be produced independently and their extent in rapidity seems to be target-independent.
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