New Intrinsic Fast Scintillator: Cesium Praseodymium Chloride

Abstract

A sample of Cs 3 PrCl 6 crystal was grown under vacuum using the vertical Bridgman-Stockbarger method. The excitation spectrum, monitored at an emission wavelength of 310 nm, showed at least two excitation bands at around 233 and 257 nm. These excitation bands corresponded to the transitions from 4f 2 ground states ( 3 H J and 3 F J ) to 5d excited states of Pr 3+ split by the ligand-field interaction and the spin-orbit coupling. Upon UV excitation at 233 nm, the characteristic Pr 3+ 4f 1 5d 1 →4f 2 emission bands were observed at 285 and 312 nm. The scintillation spectrum shows two emission bands peaking at 285 and 312 nm, which is consistent with the photoluminescence, and can thus be assigned to the transitions between the 5d 1 excited state and 4f 2 ground states owing to the Pr 3+ . The fast scintillation decay time constants were estimated to be approximately 11.7 ns (53%) and 72 ns (47%). The scintillation light yield reached 5900 ph/MeV.

Optical and Scintillation Characteristics of Tb-doped La2Si2O7 Single Crystal

“…(8,9) In addition, scintillator materials have many forms including glasses, (10)(11)(12)(13) translucent ceramics, (14)(15)(16)(17) plastics, (18,19) organic-inorganic composites, (20)(21)(22) and single crystals. (23)(24)(25)(26) Single-crystal scintillators are a preferred and common form of materials because of their high transparency, high effective atomic number, high light yield, physical durability, and chemical stability. Well-known examples are CdWO 4 (27) and Tl-doped NaI.…”

Scintillation Light Yields of Tb-doped SiO2 Glasses

“…Since the properties of scintillators have a significant impact on the performance of radiation detectors, there have been many theoretical and experimental studies on them over the past couple of decades. (1)(2)(3)(4)(5) They are still continuing to be studied, and various scintillators such as organic, (6) organic-inorganic hybrid, (7)(8)(9) and inorganic materials including fluorides, (10) chlorides, (11)(12)(13) bromides, (14,15) iodides, (16) and oxides (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28) have been investigated over the last few years. In particular, oxide scintillators have attracted considerable attention owing to their excellent chemical stability.…”

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

“…No scintillator yet meets all of these requirements, and many researchers are investigating novel scintillators. (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.…”

“…(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). (14) Glass scintillators have several advantages over crystalline scintillators, such as a lower cost, a wider range of possible compositions, and better workability.…”