Scintillation response of CdWO₄ scintillator for gamma-ray detection

Abstract

At present, scintillation materials are playing a major role in medical radiation detection. They are being used for various scans including CT scan, PET scan and SPECT scan. In this work, the researchers studied the scintillation response of the CdWO4 (CWO) crystal compared with the Bi4Ge3O12 (BGO) crystal. The energy resolution and light yield values were tested using a photomultiplier tube (PMT) readout. The gamma source was aligned along the cylindrical axis of the crystal and the PMT. The energy spectra were then recorded using a PC-based multichannel analyser (MCA). From the results, it was found that the energy resolution of 6.5 % obtained from the CWO crystal was superior than that of 9.3 % obtained from the BGO crystal of 662 keV gamma-ray energy. The CWO crystal displayed about two times greater light yield than the BGO crystal. In the energy range from 32 keV to 1, 408 keV, the degree of the light yield non-proportionality of 0.13 obtained from the CWO crystal was also more exceptional than that of 0.19 obtained from the BGO crystal. The photo-fraction of both crystals was also discussed.

Preparation of Lead-free Two-Dimensional-Layered (C8H17NH3)2SnBr4 Perovskite Scintillators and Their Application in X-ray Imaging

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Synthesis of Lu2O3-Ga2O3-SiO2 Glass as a New Glass Scintillator

“…(4)(5)(6)(7)(8)(9)(10)(11) In the case of X-or γ-ray detection, the main interaction between the ionizing radiation and the scintillator is the photoelectric effect, and the cross section is proportional to the fifth power of Z eff . (12) Therefore, a large Z eff is important for high-energy X-or γ-ray detection. Although some commercial crystalline scintillators have a large Z eff , (13) the only commercial glass scintillator is 6 Li-glass (GS-20, Saint-Gobain), which is used for neutron detection and has a small Z eff (Z eff = 22.8).…”

Highly Luminescent Nonclassical Binuclear Manganese(II) Complex Scintillators for Efficient X-ray Imaging

“…As sort of indirect radiation detectors, scintillators have the ability to emit detectable visible light by absorbing high-energy ionizing radiation and have been widely used in radioactivity detection, industrial nondestructive testing, and medical diagnosis. − Over the past decades, various traditional inorganic materials, such as CsI:Tl, Gd 2 O 2 S:Tb, NaI:Tl, and CdWO 4 , have been well applied to commercial X-ray scintillation. Nevertheless, they still suffer from the typical drawbacks, including difficult preparation process and high cost, which seriously hinder the development of X-ray imaging applications .…”