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indium-115
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indium-115

chemical isotope
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Quick Summary

Indium-115 is a chemical isotope of the element indium. Indium is a rare, soft, silvery-white metal belonging to Group 13 of the periodic table. It was discovered in 1863 and is found in trace amounts in zinc and lead ores.1

Natural indium consists of two isotopes: indium-113 (4.28%) and indium-115 (95.72%). Indium-115 is known for its very long half-life, which is associated with beta decay. The log ft value for indium-115 decay is exceptionally high, indicating a significant nuclear retardation in its decay rate, involving a spin change of four. Indium's unique properties, such as its ability to wet glass and its use in semiconductor devices, make it valuable in various technological applications.12

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2 Britannica Sources
  1. indium
  2. radioactivity - Beta decay

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