The design and testing of a pi/mu identifier suitable for use in pion-proto
n elastic scattering experiments in the momentum range 65-160 MeV/c is desc
ribed. A neural network technique is used for particle identification. The
apparatus (a multilayer scintillator stack) was found to have a particle id
entification efficiency of better than 98%. (C) 2000 Elsevier Science B.V.
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