Angular correlations between target and projectile fragments emitted from 238U + Ag(Br) collisions at 0.85 GeV/nucleon

The examination of inelastic nuclear interactions of 1 GeV/nucleon 238U in research emulsions revealed a large range of target/projectile multiplicities, from simple binary fission to complete disintegration of both the uranium projectile and the target nucleus into nucleons and light nuclear fragments. A particular class of U-reactions that the authors have begun to study are those that exhibit the classical target/projectile fragment topologies, selected by the criteria that at least 10 target- and 10 projectile-related fragments are produced in the reaction. Such reactions, when observed in emulsion, are identified with collisions of the incident uranium ions with the heavy component, Ag(Br), of the emulsion. A 4 x 11 x 1 cm3 ILFORD emulsion stack irradiated by 0.96 GeV/nucleon 238U nuclei has been scanned over the beam profile for a distance of 1 cm from the entrance surface of the stack. Of a total of 399 interactions detected in the interval 0.85 +/- 0.10 GeV/nucleon, 52 fulfilled the selection criteria. Of these, 19 events were deemed unsatisfactory for measurement owing to obscuration by nearby beam tracks and/or the proximity, i.e., less than or equal to 40μm, of the event to either the top or bottom surface of the emulsion pellicle. This report describes the status of the measurements on the angular distributions of target fragments