Analyzing powers for π±-13C→ scattering at Tπ=100 MeV

Measurements of the analyzing power for the C-13 -->(pi +/-, pi +/-) reaction at T(pi) = 100 MeV have been made at TRIUMF using a polarized target consisting of 99% C-13 enriched butanol. Data were obtained for the ground and 3.68 MeV excited states at angles from 110-degrees to 150-degrees in 10-degrees steps. The data are consistent with zero asymmetry throughout most of this angular range. Uncertainties are typically +/- 15%, which is sufficient to discriminate among some, but not all, of the currently available theoretical predictions.