  The pion production reaction $\pi^+ \to \pi^+\pi^{\pm}$ on $^{45}Sc$ was
studied at incident pion energies of $T_{\pi^{+}}$ = 240, 260, 280, 300, and
320 MeV. The experiment was performed using the $M11$ pion-channel at TRIUMF,
and multiparticle events, ($\pi^+,\pi^+\pi^{\pm}$) and
($\pi^+,\pi^+\pi^{\pm}p$), were detected with the CHAOS spectrometer. Results
are reported in the form of both differential and total cross sections, and are
compared to theoretical predictions and the reaction phase space. The present
investigation of the T-dependence of the $\pi^+ A \to \pi^+\pi^{\pm} A'$
reaction complements earlier examinations of the A-dependence of the reaction,
which was measured using $^{2}H$, $^{4}He$, $^{12}C$, $^{16}O$, $^{40}Ca$, and
$^{208}Pb$ targets at $\sim$280 MeV. Some general properties of the
pion-induced pion production reaction in nuclear matter will be presented,
based on the combined results of the two studies.
