High Resolution Position Sensitive Detectors for Differential Cross-Section Measurements of Relativistic Heavy Ions

摘要

Position measurements of high accuracy are required for ray tracing of relativistic heavy ions in various nuclear structure experiments planned at GSI. Position resolutions down to 0.1mm are required to allow for a transverse momentum measurement from which differential cross-sections for peripheral heavy ion collisions can be determined. We have explored the capability of two types of detectors, silicon-microstrip and scintillation-fiber detectors, prototypes of which were tested using an ²³⁸U beam of 600 Acdot MeV and an ⁴⁰Ar beam of 200 Acdot MeV energy.