Cross sections for the production of approximately 100 radionuclides in the interaction of silver with 25.2 GeV ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ ions and 300 GeV protons have been determined. The results have been parametrized in terms of a 10-parameter equation which accurately reproduces the measured isobaric- and mass-yield curves. The cross sections of products in the $A=40-106\mathrm{}$ mass range are consistent with the factorization hypothesis. At lower mass numbers, the yields of products formed in reactions induced by ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ ions are enhanced by over a factor-of-2 relative to the ratio of total reaction cross sections. The results are compared with Monte Carlo cascade-evaporation calculations and with the abrasion-ablation model.

NUCLEAR REACTIONS Ag(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, spallation) and Ag($p$, spallation) $E_{{}_{}{}^{12}{}_{}{}^{}\mathrm{C}}=25.2\mathrm{}$ GeV, $E_P=300\mathrm{}$ GeV. Production cross sections for ∼ 100 radionuclides; deduced charge dispersions and mass-yield curves. Comparison with cascade-evaporation and abrasion-ablation calculations.

• Received 5 February 1979

DOI:https://doi.org/10.1103/PhysRevC.19.2288