Fragmentation of 12 C projectiles interacting with 12 C, 27 Al, and 58 Ni nuclei at energy 28.7 MeV/nucleon

Inclusive spectra of different isotopes of He, Li, Be, B, C, and N nuclei emerging from the collisions of {sup 12}C ions of energy 344.5 MeV with carbon, aluminum, and nickel target nuclei have been measured in the angular range of 4{degree}--36{degree} (laboratory). Experimental yields of reaction products are almost the same for the different targets. The continuous parts of momentum spectra have been decomposed into three components, corresponding to direct and damped fragmentation and to other processes, such as deep-inelastic and/or compound-nucleus reactions. At small angles (smaller than 20{degree} in the laboratory system) the fragmentation processes dominate whereas at larger angles they become negligible in comparison to the other components. The direct fragmentation contribution is very small with respect to the damped one. The obtained reduced momentum widths of the direct fragmentation bumps are significantly smaller than those predicted by the Goldhaber model but agree with results obtained from other experiments at similar energies.