A review on natural background radiation


1 Department of Medical Physics and Medical Engineering, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

2 Department of Medical Physics, School of Medicine, Lorestan University of Medical Sciences, Khorram Abad, Iran

3 Department of Physics, Isfahan University, Isfahan, Iran


he world is naturally radioactive and approximately 82% of human-absorbed radiation doses, which are out of control, arise from natural sources such as cosmic, terrestrial, and exposure from inhalation or intake radiation sources. In recent years, several international studies have been carried out, which have reported different values regarding the effect of background radiation on human health. Gamma radiation emitted from natural sources (background radiation) is largely due to primordial radionuclides, mainly 232 Th and 238 U series, and their decay products, as well as 40 K, which exist at trace levels in the earth's crust. Their concentrations in soil, sands, and rocks depend on the local geology of each region in the world. Naturally occurring radioactive materials generally contain terrestrial-origin radionuclides, left over since the creation of the earth. In addition, the existence of some springs and quarries increases the dose rate of background radiation in some regions that are known as high level background radiation regions. The type of building materials used in houses can also affect the dose rate of background radiations. The present review article was carried out to consider all of the natural radiations, including cosmic, terrestrial, and food radiation.


1. Ramachandran TV. Background radiation people and the environment. Iran J Radiat Res 2011;9:63-76.  Back to cited text no. 1
2. Tzortzis M, Svoukis E, Tsertos H. A comprehensive study of natural gamma radioactivity levels and associated dose rates from surface soils in cyprus. Radiat Prot Dosimetry 2004;109:17-24.  Back to cited text no. 2
3. United Nations Scientific Committee of the Effect of Atomic Radiation (UNSCEAR) 2000. Sources and Effects of Ionizing Radiation. Report on General Assembly, New York: USA.  Back to cited text no. 3
4. Shahbazi-Gahrouei D. Natural background radiation dosimetry in the highest altitude region of Iran. J Radiat Res 2003;44:285-7.  Back to cited text no. 4
5. Sathish LA, Nagaraja K, Ramachandran TV. Indoor 222 Rn and 220 Rn concentrations and doses in Bangalore, India. Radiat Prot Dosimetry 2012;151:344-53.  Back to cited text no. 5
6. Kumar S, Singh S, Bajwa BS, Singh B, Sabharwal AD, Eappen KP. Indoor inhalation dose estimates due to radon and thoron in some areas of South-Western Punjab, India. Radiat Prot Dosimetry 2012;151:112-6.  Back to cited text no. 6
7. Nakamura T, Uwamino Y, Ohkubo T, Hara A. Altitude variation of cosmic-ray neutrons. Health Phys 1987;53:509-17.  Back to cited text no. 7
8. Stone JM, Whicker RD, Ibrahim SA, Whicker FW. Spatial variations in natural background radiation: Absorbed dose rates in air in Colorado. Health Phys 1999;76:516-23.  Back to cited text no. 8
9. Kam E, Bozkurt A. Environmental radioactivity measurements in Kastamonu region of northern Turkey. Appl Radiat Isot 2007;65:440-4.  Back to cited text no. 9
10. Bozkurt A, Yorulmaz N, Kam E, Karahan G, Osmanlioglu AE. Assessment of environmental radioactivity for Sanliurfa region of southeastern Turkey. Radiat Meas 2007;42:1387-91.  Back to cited text no. 10
11. Shahbazi-Gahrouei D. Annual background radiation in Chaharmahal and Bakhtiari Province. Iranian J Radiat Res 2003;1:87-91.  Back to cited text no. 11
12. Mehdizadeh S, Faghihi R, Sina S. Natural radioactivity in building material in Iran, Iran. Nukleonika 2011;56:363-8.  Back to cited text no. 12
13. Faghihi R, Mehdizadeh S, Sina S. Natural and artificial radioactivity distribution in soil of Fars Province, Iran. Radiat Prot Dosimetry 2010;138:1-9.  Back to cited text no. 13
14. Beretka J, Matthew PJ. Natural radioactivity of Australian building materials, industrial wastes and by-products. Health Phys 1985;48:87-95.  Back to cited text no. 14
15. Alam MN, Miah MM, Chowdhury MI, Kamal M, Ghose S, Rahman R. Attenuation coefficients of soils and some building materials of Bangladesh in the energy range 276-1332 keV. Appl Radiat Isot 2001;54:973-6.  Back to cited text no. 15
16. Faheem M, Mujahid SA, Matiullah M. Assessment of radiological hazards due to the natural radioactivity in soil and building material samples collected from six districts of the Punjab province, Pakistan. Radiat Meas 2008;43:1443-7.  Back to cited text no. 16
17. Khan K, Khan HM. Natural gamma-emiting radionuclides in Pakistani Portland cement. Appl Radiat Isot 2001;54:861-5.  Back to cited text no. 17
18. Msaki P, Banzi FP. Radioactivity in products derived from gypsum in Tanzania spectrometry. Radiat Prot Dosimetry 2000;91:409-12.  Back to cited text no. 18
19. Krstic D, Nikezic D, Stevanovic N, Vucic D. Radioactivity of some domestic and imported building materials from South Eastern Europe. Radiat Meas 2007;2:1731-6.  Back to cited text no. 19
20. Othman I, Mahrouka M. Radionuclide content in some building materials in Syria and their indoor gamma dose rate. Radiat Prot Dosimetry 1994;55:299-304.  Back to cited text no. 20
21. Bou-Rabee F, Bem H. Natural radioactivity in building materials utilized in the state of Kuwait. J Radioanal Nucl Chem 1996;213:143-9.  Back to cited text no. 21
22. Yang YX, Wu XM, Jiang ZY, Wang WX, Lu JG, Lin J, et al. Radioactivity concentrations in soils of the Xiazhuang granite area, China. Appl Radiat Isot 2005;63:255-9.  Back to cited text no. 22
23. Ahmad F. Natural radioactivity in building materials in Egypt. Radiat Eff Defects Solids 2007;162:43-52.  Back to cited text no. 23
24. Arafa W. Specific activity and hazards of granite samples collected from the Eastern Desert of Egypt. J Environ Radioact 2004;75:315-27.  Back to cited text no. 24
25. El-Arabi AM, Abbady AG, El-Hussein A. Gamma-ray measurements of natural radioactivity in sedimentary rocks from Egypt. Nucl Sci Tech 2006;17:123-8.  Back to cited text no. 25
26. Higgy RH, El-Tahawy MS, Abdel-Fattah AT, Al-Akabawy UA. Radionuclide content of building materials and associated gamma dose rates in Egyptian dwellings. J Environ Radioact 2000;50:253-61.  Back to cited text no. 26
27. Michaell F, Parpottas Y, Tsertos H. Gamma radiation measurements and dose rates in commonly used building materials in Cyprus. Radiat Prot Dosimetry 2010;142:282-91.  Back to cited text no. 27
28. Aslam M, Gul R, Ara T, Hussain M. Assessment of radiological hazards of naturally occurring radioactive materials in cement industry. Radiat Prot Dosimetry 2012;151:483-8.  Back to cited text no. 28
29. Cetin E, Altinsoy N, Orgün Y. Natural radioactivity levels of granites used in Turkey. Radiat Prot Dosimetry 2012;151:299-305.  Back to cited text no. 29
30. Ahmed JU. High levels of natural radiation: Report of an international conference in Ramsar. IAEA Bulletin 1991;33:36-8.  Back to cited text no. 30
31. Poulin P, Leclerc JM, Dessau JC, Deck W, Gagnon F. Radon measurement in schools located in three priority investigation areas in the province of Quebec, Canada. Radiat Prot Dosimetry 2012;151:278-89.  Back to cited text no. 31
32. Huy NQ, Hien PD, Luyen TV, Hoang DV, Hiep HT, Quang NH, et al. Natural radioactivity and external dose assessment of surface soils in Vietnam. Radiat Prot Dosimetry 2012;151:522-31.  Back to cited text no. 32
33. Mustafa CT, Selma B. Radioactivity concentrations in soil and dose assessment for Samsun City Centre, Turkey. Radiat Prot Dosimetry 2012;151:532-6.  Back to cited text no. 33
34. Belivermiº M. Vertical distributions of 137 Cs, 40 K, 232 Th and 226 Ra in soil samples from Istanbul and its environs, Turkey. Radiat Prot Dosimetry 2012;151:511-21.  Back to cited text no. 34
35. Benedik L, Jeran Z. Radiological of natural and mineral drinking waters in Slovenia. Radiat Prot Dosimetry 2012;151:306-13.  Back to cited text no. 35
36. Ramachandran TV, Mishra UC. Measurement of natural radioactivity levels in Indian foodstuffs by gamma spectrometry. Appl Radiat Isot 1989;40:723-6.  Back to cited text no. 36
37. IAEA, International Atomic Energy Agency. Natural and induced radioactivity in food. Vienna: IAEA, TECDOC; 2002. p. 1287.  Back to cited text no. 37
38. Shahbazi-Gahrouei D, Saeb M. Dose assessment and radioactivity of the mineral water resources of Dimeh springs in Chaharmahal and Bakhtiari Province, Iran. Nukleonika 2008;53:31-4.  Back to cited text no. 38