Virtual photon interaction depths of CdZnTe detectors in the energy range of 50-662 keV

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Atıf İçin Kopyala

Yuecel H., Solmaz A. N., Bor D.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, cilt.280, sa.3, ss.569-575, 2009 (SCI-Expanded)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 280 Sayı: 3
• Basım Tarihi: 2009
• Doi Numarası: 10.1007/s10967-008-7441-y
• Dergi Adı: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Sayfa Sayıları: ss.569-575
• İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

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 gamma-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 gamma-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.