Abstract
Mercuric iodide, a high- Z, wide band-gap semiconductor material, is a room temperature gamma-ray detector. Poor hole transport properties limit the detector performance. By parallel pulse processing schemes we are exploring this problem and making corrections to enhance resolution. This yields interaction depth information which is used to estimate hole collection deficits. Deficit estimates are used as corrections to pulse height to enhance resolution, or to reject pulses from high-deficit regions. These techniques have been implemented by several schemes for filtering the pulses using off-the-shelf amplifiers and computer simulation of amplifiers on detectors from 1–3 mm thick. Hardware and simulated results are compared and improved spectral performance is discussed. A resolution better than 7% for correction and 2.5% for rejection of hole deficit is obtained.
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