Abstract
The reaction cross section and analyzing power for near-threshold pion-production reactions 12,14 C( p , π −) 13,15 O g.s are calculated with the two-nucleon model. We have used the shell-model wave functions to describe the target and the residual nuclear states. It is shown that the dominant two-body amplitudes are those with the final two protons coupled to angular momentum f = 0; p + n →(p + p) I f = 0 + π −. The analyzing power distributions are greatly influenced by the pion distortion effects and exhibit a clear isotope dependence. These are compared with experimental data.
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