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Webster ¦r¨å:
Tritium. A rare radioactive hydrogen isotope with atomic mass 3 and half-life 12.5 years, prepared artificially for use as a tracer and as a constituent of hydrogen bombs .

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American Heritage Scientific Reference:

"LumiNova" and "Super-LumiNova" are marketing brand name.
"LumiNova" »P "Super-LumiNova" ¬OÀç¾P«~µP¡C

It is strontium aluminate¡Vbased non-radioactive and nontoxic photoluminescent pigment.
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It was invented in 1993 as a safe replacement for radium-based luminous paints.
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