Heat Source For RTGs
The radioactive decay of strontium-90 generates significant amount of heat (0.921 W/g) of the isotope or approximately 0.536 W/g of the compound. and is cheaper than the alternative 238Pu. It is used as a heat source in many Russian/Soviet radioisotope thermoelectric generators, usually in the form of strontium fluoride. It was also used in the US Sentinel series of RTGs in the form of strontium titanate.
Read more about this topic: Strontium-90, Industrial and Aerospace Applications
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