  Preliminary results are presented from a new positron beam system currently
under development at the University of Texas at Arlington for the coincident
energy measurement of Doppler-shifted annihilation quanta and positron-induced
Auger electrons. We report data based on an analysis of the pulses resulting
from the detection of positron induced secondary electrons by a micro-channel
plate detector in coincidence with the pulses resulting from the detection of
associated annihilation gamma rays in a NaI(Tl) gamma detector.
