Abstract
In this study, the validity of the effective (virtual) point-detector concept for the CdZnTe (CZT) detector for disc-shaped radioisotope sources has been investigated in the photon energy range of 50-662 keV. It has been found that the virtual point-detector model is valid for conventional CZT detectors. The photon energy dependence of the virtual interaction depth (VID) in the CZT detector does not seem to fit to a good trend. However, in general, the measured VID values are increasing with increasing γ-ray energy in the range of 50-662 keV, but the VID values always remain within the physical thickness of the CZT detector. For instance, the VID value was measured to be about 4.4±0.5 mm in the 5 mm thick CZT detector at 662 keV γ-ray energy. In application, the VID values for photons can be used for efficiency calculation models by scaling the measured detection efficiency as a function of energy and source-to-detector distance.
| Original language | English |
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| Pages (from-to) | 569-575 |
| Number of pages | 7 |
| Journal | Journal of Radioanalytical and Nuclear Chemistry |
| Volume | 280 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 2009 |
| Externally published | Yes |
Funding
This work was carried out within the framework of the project No. DPT 2005K-120130 supported by AU-INS under the cooperation agreement between AU and TAEA. Authors also express their sincere gratitude to Prof. Dr. H. Y. GÖKSU from AU-INS.
| Funders | Funder number |
|---|---|
| AU-INS |