Abstract
A simple counting technique is described for absolute counting of beta particles using a 4 π liquid scintillator counter technique. The radioactive sample is deposited on a thin backing film of transparent material, which is then immersed in the liquid scintillator. It was found that for samples with a maximum beta particle energy greater than 0.7 MeV the detection efficiency was close to 100% comparing favourably with other methods of absolute counting.
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