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Hemisphere: Northern / Southern
Colors: Black / Olive Drab / Coyote Brown / Pink
Material: Tritium / Phosphorescent
Tritium
Tritium is a radioactive isotope of hydrogen. Unlike the common hydrogen atom, which has one proton and no neutrons in its nucleus, tritium has one proton and two neutrons. This extra mass makes it heavier and gives it unique properties.
One of the most notable features of tritium is its ability to emit low-energy beta radiation. This radiation is not strong enough to penetrate human skin or other materials, making tritium relatively safe to handle. However, when combined with phosphorescent materials, the beta radiation causes the phosphor to glow, creating a constant light source. This property is why tritium is often used in self-luminous devices like watch dials, compasses, and exit signs, where a consistent glow is needed without relying on external power sources.
The glow provided by tritium can last for many years, typically around 10 to 20 years, depending on the amount of tritium used and the type of phosphor. This long-lasting, maintenance-free illumination makes tritium an ideal choice for applications where reliable, low-light visibility is essential.
