The influence of the soil and plant natures and pollution on the radon andthoron alpha-activities inside various herbal infusions by using solid state nuclear track detectors

Uranium and thorium contents were determined in samples of various plants i n the soils in which the plants were grown, and in herbal infusions made bq boiling the plants in potable water. using CR-39 and LR-115 solid state nu clear track detectors. In addition, radon and thoron alpha-activities per u nit volume inside the plants, soils and herbal infusions were measured. The se measurements were completed bq an investigation of the radon transfer be tween soils and plants and that between plants and herbal infusions, and al so by the investigation of the influence of pollution due to different mate rial dusts on the radon and thoron alpha activities inside the plants and t heir infusions.