Determination of thorium and uranium contents in geological samples by using solid state nuclear track detectors

Thorium to uranium ratios have been determined in different geological samples by using CR-39 and LR-115 solid-state nuclear track detectors (SSNTD). A calibration method, based on determining SSNTD registration sensitivity series, has been developed. Thorium and uranium contents of samples studied have been determined and compared to data obtained by mass spectrometry.