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Strontium aluminates have been examined as proposed materials for immobilization of fission products of radioactive waste, namely strontium-90. [10] Europium-doped strontium aluminate nanoparticles are proposed as indicators of stress and cracks in materials, as they emit light when subjected to mechanical stress ( mechanoluminescence ).
Strontium aluminate is frequently used in glow in the dark toys, ... Strontium-90 is a radioactive fission product produced by nuclear reactors used in nuclear power.
Phosphorescent pigments performance, in visible light, in dark, after 4 minutes in dark - zinc sulfide (left) and strontium aluminate (right) based materials Super-LumiNova is a brand name under which strontium aluminate –based non- radioactive and nontoxic photoluminescent or afterglow pigments for illuminating markings on watch dials ...
Strontium aluminate based pigments are now used in exit signs, pathway marking, and other safety related signage. [ 22 ] Zinc sulfide (left) and strontium aluminate (right), in visible light, in darkness, and after 4 minutes in the dark.
Pearl Scene using phosphorescent paint, Irving Berlin's 1921 Music Box Revue Phosphorescent paint is commonly called "glow-in-the-dark" paint. It is made from phosphors such as silver-activated zinc sulfide or doped strontium aluminate, and typically glows a pale green to greenish-blue color.
The excitation wavelengths for strontium aluminate range from 200 to 450 nm. The wavelength for its green formulation is 520 nm, its blue-green version emits at 505 nm, and the blue one emits at 490 nm. Colors with longer wavelengths can be obtained from the strontium aluminate as well, though for the price of some loss of brightness.
Electrons within the pigment are being "excited" by ultraviolet light exposure—the excitation wavelengths for strontium aluminate range from 200 to 450 nm electromagnetic radiation—to a higher energetic state and after the excitation source is removed, fall back to their normal energetic state by releasing the energy loss as visible light ...
In addition to the four stable isotopes, thirty-two unstable isotopes of strontium are known to exist, ranging from 73 Sr to 108 Sr. Radioactive isotopes of strontium primarily decay into the neighbouring elements yttrium (89 Sr and heavier isotopes, via beta minus decay) and rubidium (85 Sr, 83 Sr and lighter isotopes, via positron emission or ...