Y-90 (Sr-90)

Strontium-90 decay product, used medically to treat oncology. Otherwise, it is always combined with the parent isotope Strontium-90 Used as a reference source in beta-sensitive dosimeters. The spectrum has no characteristic peaks, all spectra of beta emitting sources are linear, making it very difficult to identify the isotope. Also, strontium-90 is often a companion of cesium-137, although it is extremely difficult to distinguish it from the other components of the spectrum. Radiacode-103 is more sensitive not to the beta particles themselves, but to the bremsstrahlung that occurs when it interacts with environmental materials.