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Full-Text Articles in Physical Sciences and Mathematics
A Directional Algorithm For An Electronically-Collimated Radiation Detector (Ecrd), Adam Lackie
A Directional Algorithm For An Electronically-Collimated Radiation Detector (Ecrd), Adam Lackie
LSU Master's Theses
An electronically-collimated radiation detector (ECRD) is being developed to be used for locating radiation sources, e.g. for intraoperative localization of sentinel lymph nodes, or for public safety applications. The design emphasizes a compact, portable detector with a wide field of view. Typical probes provide either high sensitivity but no directional information when uncollimated, or directional information but poor detection efficiency when collimated. The ECRD design provides high sensitivity to the presence of radiation because it lacks physical collimation, and simultaneously provides directional information using electronic collimation. Intended to be a hand-held device, the ECRD front end comprises an array of …
Experimental Investigation Of An Electronically Collimated Radiation Detector For Location Of Gamma-Ray Sources, William H. Hill Jr.
Experimental Investigation Of An Electronically Collimated Radiation Detector For Location Of Gamma-Ray Sources, William H. Hill Jr.
LSU Master's Theses
A electronically collimated prototype detector was built with commercially available cadmium zinc telluride (CZT) modules and assessed by experiment and simulation. Sensitivity was roughly equivalent to a common hand held 1"x1" NaI(Tl) detector. The maximum useful count rate was 300 counts per second (cps) per module. Overall angular error was less than 7°, which is generally less than source placement uncertainty, and angular resolution was between 20° and 40° for several common isotopes with photon energies between 511 keV and 1333 keV. Prototype data and backprojections were used to verify a simple three dimensional model of charge induction in pixellated …