Segmentation and Pulse Shape Discrimination Techniques for Rejecting Background in Germanium Detectors
- 1 February 1984
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 31 (1) , 367-371
- https://doi.org/10.1109/tns.1984.4333279
Abstract
We examine the possibility of rejecting the internal ß-decay background in coaxial germanium detectors by distinguishing between the multi-site energy losses characteristic of photons and the single-site energy losses of electrons in the range 0.2 - 2 MeV. The photon transport was modeled with a Monte Carlo routine. We investigate background rejection by both multiple segmentation and pulse shape discrimination techniques. The efficiency of a six 1 cm-thick segment coaxial detector operating in coincidence mode alone is compared to that of a two-segment (1 cm and 5 cm) detector employing both front-rear coincidence and PSD in the rear segment to isolate photon events. Both techniques can provide ≿95% rejection of single-site events while accepting ≿80% of the multi-site events above ~500 keV.Keywords
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