Measurements Of Asymmetries Of Pion Single Charge Exchange On Polarized He-3 At 200 Mev

Asymmetries for the (pi(-), pi(0)) reaction on polarized He-3 were measured using a 200-MeV pion beam at LAMPF. The pi(0)'s were detected with the neutral meson spectrometer in coincidence with the recoiling tritons. A recoil triton detector, consisting of scintillation-counter telescopes and a wire chamber, was used to measure the time-of-flight, energy loss, and direction of the tritons. The polarized gaseous He-3 target, developed at TRIUMF, was modified to run with two diode lasers; the polarization reached 65%. The asymmetries between theta(lab)=60 degrees and 105 degrees were found to be strongly angle dependent. The results are compared with theoretical calculations. [S0556-2813(99)02208-6].