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Updated: Jul 19, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
Published on: February 1, 2016
HPGe virtual point detector for radioactive disk sources
Z B Alfassi1, N Lavi, O Presler
1Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel. alfassi@bgumail.bgu.ac.il
Abstract:
Validity of the model of a virtual point detector (implying existence of a point where all interactions virtually occur) was confirmed for measurements of radioactive disk sources with HPGe detectors. The existing correlation of the count rates with the distance between the virtual plain detector and the detector face makes it possible to inter- and extrapolate calibration curves for disk radioactive sources for use at different source-detector face distances. The dependence of the distance between the virtual plane detector and the detector face on the photon energy was studied for sources of various radii.
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