LiF/CaF₂/LiBaF₃ ternary fluoride eutectic scintillator

Abstract

LiF/CaF2/LiBaF3 eutectic scintillators were grown by the m-PD method. In the solidified eutectic the phases were uniformly distributed in the transverse direction and slightly aligned along the growth direction. For the Eudoped samples, the expected emission peak observed at 420 nm was ascribed to Eu 2+ 5d-4f transition from Eu:CaF2 under X-ray excitation. The Li concentration in the LiF/CaF2/LiBaF3 eutectic is around 67.9 mol%. This is the advantage for neutron detection because 6 Li has high neutron capture cross-section. Due to the expected high sensitivity, the grown eutectic scintillator is promising candidate for application in neutron imaging such as nondestructive inspection, etc. In our presentation, relation between chemical composition of starting materials, growth rate and volume ratio of eutectic will be discussed. Furthermore, other scintillation properties will be reported.

Growth and Scintillation Properties of Directionally Solidified Ce:LaBr3/AEBr2 (AE = Mg, Ca, Sr, Ba) Eutectic System

“…In PSSFs, the emitted scintillation is confined and transported along the eutectic structure by a total reflection mode, so that light diffusion can be reduced and high-resolution imaging can be achieved. Research on PSSFs such GAP/α-Al2O3 [13,14], SrHfO3/Al2O3 [15], Gd2Si2O7/SiO2 [16], and LiF/CaF2/LiBaF3 [17] has been previously reported by our group.…”

Structured Scintillators for Efficient Radiation Detection

“…In addition to CaF 2 /LiF, other array-derived structured scintillators with lamellar feature have been investigated, including SrF 2 /LiF, [81] LiSrI 3 /LiI, [82] BaCl 2 /LiCl, [83] Lu 3 Al 5 O 12 (LuAG)/Al 2 O 3 , [84] and CaF 2 /LiBaF 3 /LiF. [85] For instance, Yanagida et al fabricated SrF 2 /LiF structured scintillators via the micro pulling down (μ-PD) method. [81] Under 252 Cf neutron excitation, the sample exhibited a light yield of 4500-5500 ph n -1 and fast decay time of 120-160 ns.…”

Growth and scintillation properties of Eu doped BaCl2/LiF eutectic scintillator

“…For the decay time measurement the same setup with the PMT and digital oscilloscope TD5032B were used. In the measurements, 6 Li-loaded glass scintilator (GS20; Saint Gobain) with the size of 1 Â 2 Â 6 mm 3 which had the light yield of 6000 ph/n [13,14] was used as a reference. The polished crystal was optically coupled to the window of the PMT with an optical grease (OKEN 6262A).…”

“…Possibility of high resolution detection using DSE system for X-ray CT application has been proposed for GdAlO 3 /Al 2 O 3 [9] and CsI-/NaCl [10]. Some eutectics containing Li have been investigated for neutron detection system, for example LiF/SrF 2 [11], LiF/CaF 2 [12], LiF/ LiGdF 4 [13] and LiF/CaF 2 /LiBaF 3 [14] .…”