Spectroscopic and radioluminescence properties of two bright X-ray phosphors: Strontium barium chloride doped with Eu2+ or Sm2+ ions

A Novel Blue‐Emitting Phosphor of Eu2+‐Activated Magnesium Haloborate Mg3B7O13Cl

“…Figure shows the temperature‐dependent decay curves of Mg 3 B 7 O 13 Cl:Eu 2+ phosphor and the lifetimes of the Eu 2+ emission at different temperature. The luminescence lifetime of Mg 3 B 7 O 13 Cl:Eu 2+ is 0.6 μs at 300 K. This value is shorter than those in the reported Eu 2+ ‐doped scintillating materials such as Sr 0.7 Ba 0.3 Cl 2 :Eu 2+ (1.6 μs), Ba 3 BP 3 O 12 :Eu 2+ single crystal (860 ns), SrCl 2 :Eu 2+ (0.95 μs), CsCaBr 3 :Eu 2+ (897 ns), and CsSrBr 3 :Eu 2+ (972 ns) . The results in this work indicate that Mg 3 B 7 O 13 Cl:Eu 2+ shows a scintillating characteristic under high‐energy ray even at room temperature.…”

Investigation of the influence of strontium carbonate on fluorescence spectra of oxy-fluoride glasses doped with samarium oxide and samarium fluoride

“…It is known from the literature that this wavelength is located in a region characterized by Sm 2+ fluorescence. [3,6] The newly observed peak is most intensive for a 565 nm excitation and best shaped at 572 nm. It is seen from the figure that in the 600 nm to 670 nm range the intensity of the fluorescence spectra is very low and peaks are buried in noise.…”

Properties of Sm-Doped SrCl2 Crystalline Scintillators

“…Alkaline earth halides doped with divalent rare-earth ions, as represented by Eu:SrI 2 [21][22][23][24][25], exhibit high-scintillation LY and high energy resolution, and Sm 2+ has been recently attracting attention as an emission center showing red-NIR photons [26][27][28]. So far, there have been few reports of radioluminescence (RL) from Sm 2+ -doped materials [29][30][31][32][33][34]. The properties of Sm-doped SrCl 2 have not yet been clarified, despite its relatively low deliquescence, ease of growth, and adequate bandgap energy (~5.2 eV [35]).…”