Fragmentation of relativisticFe56

The fragmentation of ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$ at 1.88 GeV/nucleon has been studied on H, Li, Be, C, S, Cu, Ag, Ta, Pb, and U targets. The detection apparatus consisted of a simple transmission detector. A method is presented which eliminates the effects of multiple interactions in the targets which were typically half an interaction-length thick. Elemental production cross sections, $\sigma \mathrm{}\left(Z\right)\mathrm{}$, were measured for $Z=13\mathrm{} \mathrm{to} 25$. Measured charge-changing cross sections, ${\sigma }_{\Delta Z\ge 1}$, and derived mass-changing cross sections, ${\sigma }_{\Delta A\ge 1}$, are presented for each target. The $\sigma \mathrm{}\left(Z\right)\mathrm{}$ factor into a term which depends only on the target and a term which depends only on the fragment observed. The ${\sigma }_{\Delta Z\ge 1}$ and ${\sigma }_{\Delta A\ge 1}$ follow a simple geometric behavior. The cross section for the removal of one proton from the ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$ projectile is enhanced for the heavier targets. This effect is described by a model assuming Coulomb dissociation. The $\sigma \mathrm{}\left(Z\right)\mathrm{}$ for ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$ on the $H$ target are compared to the semiempirical formulas of Silberberg and Tsao.