@article { author = {Zehtabvar, ‎M‎ehrnaz and Sardari, ‎D‎ariush and ‎Jahanfarnia, ‎Gh‎olamreza}, title = {Measurement of naturally occurring radioactive materials concentration in Tehran’s water using Gamma spectrometry}, journal = {Radiation Physics and Engineering}, volume = {1}, number = {1}, pages = {1-5}, year = {2020}, publisher = {K. N. Toosi University of Technology}, issn = {2645-6397}, eissn = {2645-5188}, doi = {10.22034/rpe.2020.57882}, abstract = {‎The concentration of naturally occurring radioactive materials (NORM) in surface water and irrigation wells is measured using gamma ray spectrometry by HPGe detector‎. ‎Measurement was carried out for samples that were collected over seventeen points in Tehran city and its suburbs‎. ‎The samples were prepared in compliance with the principles from irrigation wells of city‎. ‎The specific radioactivity of Ra-226‎, ‎Th-232 and K-40 were measured and the results from different locations covered a range with the minimum being below "minimum detectable activity‎" ‎up to maximum of 4.04‎, ‎and 6.85 and 4.7 Bq per liter of water‎, ‎respectively‎. ‎The accumulation of radioactive materials in the samples from southern areas of Tehran was more than that of central areas‎. ‎Also‎, ‎concentration of Ra-226 in all the samples was less than the Derived Release Limit of Canada and Environmental Protection Agency standard threshold‎.}, keywords = {‎Naturally radioactive materials,‎Gamma ray spectrometry,‎HPGe detector,‎Tehran's water}, url = {https://rpe.kntu.ac.ir/article_57882.html}, eprint = {https://rpe.kntu.ac.ir/article_57882_28456f715939469b56483ca8f76c96b3.pdf} }