Spectrum isotopes library

Sr-90 (Y-90)

β radiation
Half-life: 28,8 years

Main emission lines: linear spectrum

Where detected

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.