Photoluminescence and Scintillation Properties of Rb2CeCl5 Crystal

Abstract

A new Rb 2 CeCl 5-based crystalline scintillator was grown by the vertical Bridgman-Stockbarger method for application in X-ray and gamma-ray detection. In the X-ray diffraction (XRD) analysis, most peaks of the grown crystal were in good agreement with the database of Rb 2 CeCl 5 , whereas a few peaks of Rb 3 CeCl 6 were also identified. The photoluminescence and scintillation properties of a Rb 2 CeCl 5 crystal were studied under excitation by UV light, X-rays, and γ-rays. The photoluminescence and scintillation spectra showed an emission band peak at 370 nm, with a shoulder at around 350 nm, which was assigned to the 5d 1-4f (2 F 5/2 , 2 F 7/2) allowed transitions of Ce 3+. The calculated scintillation decay time constants were approximately 24 and 153 ns. The scintillation light yield reached 36000 photons/MeV with an energy resolution of 15% at 662 keV.

Vacuum-UV-excited Photoluminescence and Scintillation Properties of CsCl Transparent Ceramics and Single Crystal

“…On the other hand, a CsCl single crystal was grown by the vertical Bridgman-Stockbarger method, which is conventionally used for preparing halide scintillators. (27)(28)(29) The raw powder of CsCl was loaded into a quartz ampule and dried in two steps, namely, heating at ~150 ℃ for 1 h and that of ~400 ℃ for 2 h in vacuum. Next, the dried powder was enclosed in a vacuum-sealed quartz ampule, and the sealed ampule was set in a Bridgman furnace (VFK-1800, Crystal Systems Corp.).…”

Scintillation Properties of Ti- and Zr-doped Gd2Hf2O7 Crystals

“…Scintillators are phosphors that immediately convert absorbed high-energy photons (1) or particles (2,3) into numerous UV-visible photons, and they have been utilized in many fields of radiation detection such as medical imaging, (4) security, (5) astrophysics, (6) and geophysical resource exploration. (7) For X-or γ-ray detection, scintillators generally require high scintillation light yield (LY), short decay time, high energy resolution, large effective atomic number, high density, and low afterglow levels; however, since no developed scintillators satisfy all these requirements, users must select a suitable one from existing scintillators.…”

Comparative Studies of Scintillation Properties of Tl-based Crystals

“…Recently, halide materials have attracted much attention for scintillator applications since they have a relatively narrower bandgap than oxide and nitride materials, and a narrow bandgap is advantageous for scintillators based on conventional Robbins (19) and some empirical (20,21) models. On the basis of these models, many halide scintillators have been developed, (22)(23)(24)(25)(26)(27)(28)(29)(30) and some of them can reach the production stage in some companies. (22)(23)(24) Among such halide materials, Tl-based crystalline materials have shown excellent scintillation properties such as high light yield and energy resolution.…”