Search for Anomalous Fragments Produced in Collisions with Heavy Target Nuclei and inΔZ=1Peripheral Interactions

Abstract
We exposed a stack of CR39 track detectors containing Ag foils to a 1.7-GeV/nucleon Fe56 beam and investigated the anomalous mean-free-path effect. Neither the whole set of 7517 nor a subset of 2542 interacting fragments produced probably in the Ag target show an effect. By combining the data of this and an earlier experiment we can also exclude an effect for 3219 interacting fragments produced in ΔZ=1 collisions.