CdZnTe crystals equipped with Frisch collars are studied at the Semiconductor Materials and Radiological Technologies Laboratory (S.M.A.R.T. Lab) at Kansas State University for use as room-temperature, high-resolution, semiconductor gamma-ray detectors. Obtaining plots of Relative Pulse Height vs. Input Photon Energy by testing with monoenergetic radioactive sources yields widely-spaced data points, but a Compton-scattering two-detector system can generate electrons with a range of energies within the crystal being tested, yielding a continuous curve. The linearity of the resulting curve is a limiting factor for the energy resolution of the semiconductor material.
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