Results of simple sequential model calculations are presented and compared with experimental data covering a wide variety of targets and energies. The model is fairly successful at higher energies (greater than about 200 MeV) but fails badly at lower energies.

[NUCLEAR REACTIONS (${\pi }^{+},{\pi }^{-}$) cross sections calculated and compared with experiment: $80 \mathrm{MeV}<~E_{\pi }<~300 \mathrm{MeV}$.]

• Received 2 March 1981

DOI:https://doi.org/10.1103/PhysRevC.24.221