Quantification of ²²²Rn exhalation rates and effective ²²⁶Ra content from geological samples across the Kopili Fault Zone, India

The study presents measurements of ²²²Rn exhalation rates, ²²⁶Ra contents and radiological exposure doses of granite, gneiss, shale, sandstone and soil samples across the seismically active Kopili Fault Zone, India using LR-115 (II) track detectors. The granites were found to have higher ²²²Rn exhalation rates than the other types of rocks. The study shows higher ²²²Rn exhalation rates and radiological exposure doses of soil samples collected near the fault than those collected away from the fault. However, the ²²⁶Ra contents in every geological sample were within the global average value of 40 Bq kg^-1 for materials used in common buildings. (author)