International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1396
7
1
gregorian
2017
10
1
15
4
online
1
fulltext
en
Natural radioactivity in rock samples of Aravali hills in India
Radiation Biology
Radiation Biology
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: Natural radionuclides in rock samples, primarily <sup>238</sup>U (uranium), <sup>232</sup>Th (thorium) and <sup>40</sup>K (potassium), are the main source of radiation exposure to workers and general public and their measurement is of paramount importance from radiation protection point of view. Materials and Methods: Gamma spectrometry using HPGe detector was used to measure the radioactivity and assess the radiological hazards and annual effective dose. The data is statistically significant. Results: In the studied rock samples, the mean activity of <sup>238</sup>U, <sup>232</sup>Th, <sup>40</sup>K is 12.15 ± 1.68 Bq/kg, 45.17 ± 6.92 Bq/kg and 639.24 ± 115.86 Bq/kg, respectively. The mean values of radium equivalent activity, radiological hazards external hazard index (Hex), Internal hazard index (Hin), Gamma index (Iγ) and Alpha index (Iα) are 125.96 ± 14.94 Bq/kg, 0.34 ± 0.04, 0.37 ± 0.04, 0.48 ± 0.06 and 0.06 ± 0.00 respectively. The mean values of absorbed dose rate, indoor and outdoor annual effective dose of gamma radiation are 59.55 ± 7.16 nGy/h, 0.29 ± 0.04 mSv and 0.07 ± 0.00 respectively. A strong positive correlation was observed between the radium equivalent activity and the absorbed dose (correlation coefficient R2 = 0.99). Conclusion: The present investigations showed that the inborn radioactivity is within the world and Indian average value. And the findings indicate that the studied samples do not pose any significant radiation hazard to the public in large and the workers in particular and when used as construction material also.</div>
Radiological hazards, dose, rock, radium equivalent activity, gamma spectrometry
391
398
http://ijrr.com/browse.php?a_code=A-10-1-691&slc_lang=en&sid=1
R.
Kumari
riyasisodiya007@gmail.com
7900319475328460015560
7900319475328460015560
Yes
Department of Physics, Aggarwal College Ballabgarh, Haryana, India
K.
Kant
7900319475328460015561
7900319475328460015561
No
Department of Physics, Aggarwal College Ballabgarh, Haryana, India
M.
Garg
7900319475328460015562
7900319475328460015562
No
Faculty of Humanities and Applied Sciences, YMCAUST, Faridabad, Haryana, India