beta-emitting radioisotopes such as C14, H3, P32, P33 and S35; beta/gamma emitters such as Na22, K40, Ca45, I125; Gas Chromatographs; x-ray machines; portable nuclear gauges,
beta-emitting radioisotopes such as C14, H3, P32, P33 and S35; beta/gamma emitters such as Na22, K40, Ca45, I125; Gas Chromatographs; x-ray machines; portable nuclear gauges,