Abstract
A Compton imager has been developed based on a single germanium strip detector. The system has the ability to image point or continuous gamma ray sources located anywhere in a 4-π field of view. The effective energy range for imaging is approximately 200 keV to greater than 1 MeV. The system was designed as a prototype for a field deployable system. Therefore, custom electronics were designed and other efforts were made such that the entire system could fit on a small lab cart and be moved by a single person. Possible applications include search and monitoring of radionuclide material. Various images are shown and the ability of the imager to find a source in the presence of high background is demonstrated. The absolute imaging efficiency of the detector at 511 keV is shown to be ∼ 4 * 10-3 for this system. Of events that deposited their full energy in the detector, it is shown that ∼20% are suitable for imaging using current techniques. Methods to improve the efficiency in future systems are discussed.
| Original language | English |
|---|---|
| Article number | N36-114 |
| Pages (from-to) | 1435-1439 |
| Number of pages | 5 |
| Journal | IEEE Nuclear Science Symposium Conference Record |
| Volume | 2 |
| State | Published - 2003 |
| Externally published | Yes |
| Event | 2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States Duration: Oct 19 2003 → Oct 25 2003 |