Abstract
A Large size of Φ70 mm x 71 mm (2.1 kg) CdWO4 crystal with excellent quality was studied for the energy response of the crystal to the γ-rays. The large crystal was coupled with a green-extended Photomultiplier tube (PMT) and tested at room temperature. We measured light yield and energy resolution of the crystal using various radioactive sources. The energy resolutions of the CdWO4 crystal were obtained to be 9.5 % and 5.3% for 662 keV and 2614 keV, respectively. Linearity of the crystal in different γ-ray energy was also measured. In the environmental background spectrum, well defined peaks of 1461 keV by 40K decay and 2614 keV by 208Tl decay were identified. A simulation study with GEANT4 package was performed for the efficiency comparison with commonly used NaI(Tl) crystal scintillators. The study showed that the CdWO4 crystal is the promising candidate for the boarder control and energetic X-and γ-ray detection equipment.
Original language | English |
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Pages (from-to) | 356-359 |
Number of pages | 4 |
Journal | Journal of Nuclear Science and Technology |
Volume | 45 |
DOIs | |
State | Published - 2008 |
Keywords
- CdWO
- Efficiency
- Energy resolution
- Linearity
- Number of photoelectron
- Scintillation properties