en Radiation Biology Radiation Biology تحقيق بديع Original Research <p><strong>Background</strong>: The presence of radionuclides in the soil, measures need to be taken to minimize the radiation dose to humans. It is mostly gamma-emitting radionuclides that contribute to the radiation dose in long term behavior of these radionuclides in soil may determine the extent to which such countermeasures need to be applied. </p><p><strong>Materials and Methods</strong>: The activity concentration of these radionuclides in the soil samples that collected from the Longwood forest at western Ghats have been analyzed using Gamma spectrometry. </p><p><strong>Results</strong>: The mean activities of ²³⁸U, ²³²Th and ⁴⁰K were observed 26.261Bq/kg, 53.614 Bq/kg, 204.084 Bq/kg, dry weight, respectively. The average value of dose rate was calculated 55.48 nGy/h by applying the conversion factor where as the environmental dosimeter shows the absorbed dose rate at 1m high is 96.96 nGy/h. </p><p><strong>Conclusion</strong>: It was observed that the activity concentration of primordial radionuclides and the gamma dose rate measurements by ERD and from soil is relatively higher than world average. </p> 238U, 232Th and 40K, Western Ghats- South India, absorbed dose, ERD, monazite, Igneous rock. 17 22 http://ijrr.com/browse.php?a_code=A-10-1-228&slc_lang=en&sid=1 Manigandan pkmgs@yahoo.com 79003194753284600736 79003194753284600736 Yes Selvasekarapandian 79003194753284600737 79003194753284600737 No Manikandan 79003194753284600738 79003194753284600738 No