Fragmentation cross section of 800 A · MeV silicon ions on polyethylene target

The total charge-changing cross sections and the partial cross sections of projectile fragment production of the fragmentation of silicon ions on polyethylene target at 800 A · MeV are measured using CR-39 plastic nuclear track detector. The total charge-changing cross sections of silicon ions on polyethylene targets at 800 A · MeV is 761 ± 24 mb, which agree well with the prediction of Bradt-Peters semi-empirical formula using parameter r 0 = 1.31fm and b = 0.94 within experimental errors. The obvious even-odd effect is observed for the partial cross sections in present investigation.