Development of measurement system for adsorption of long-lived radon decay products on the leaf surface of tobacco plants.

Our previous studies indicated the suitability of tobacco plants for biomonitoring remediated depositories, due to their Po and Pb accumulation ability. The methods and requirements of testing Pb uptake by leaf-surface adsorption was investigated and implemented in the construction of a controlled environment. Uranium ore (theoretical Rn concentration 638 Bqm) was the main source of radon and progeny. Rn concentrations were measured by RAD7, AlphaGUARD, EQF 3220, RTM 2100 and CR-39 SSNTDs (411-516 Bqm). Activity concentrations of the attached and unattached fractions were determined by EQF 3220. The results are indicative of good measurement setup for tracking Po(Pb) uptake pathways. [ABSTRACT FROM AUTHOR]