“…It is thus one of the fallout contaminants of interest in agricultural products. Fallout Cs137 in agricultural products has been measured by bulk counting, using large scintillation crystals and multichannel pulseheight analyzers (7,2,9). This method, aside from requiring very specialized instrumentation, is subject to interference from -rays of RuRh103• 106 and ZrXb93, if they are present in a high ratio to Cs137.…”