GEP  Vol.6 No.4 , April 2018
Natural Radiation Dose and Geomagnetic Effect
Abstract: Earth keeps getting bombarded by high-energy particles that originate in the outer space and in Sun. Cosmic radiation in Earth’s atmosphere consists of a photon and directly ionizing component and a neutron component. Charged particles of cosmic radiation are deflected by the geomagnetic field that is more expressed at the equator than near the poles. Photon radiation was measured by Radiameter ESM FH 40G-L10 at 26 main meteorological stations in all parts of Croatia. The correlation between the photon dose rate and latitude was examined, as well as multiple correlations for the photon dose, latitude and altitude. The obtained positive correlation coefficients were statistically significant. The neutron component of the cosmic radiation was measured by series of nuclear track-etched detectors, at the same meteorological stations during one year period. The dependence of the neutron dose rate on the altitude was found and the associated equation of the linear regression was derived. Relation between the values of neutron dose N and altitude h, showed significant dependence of the neutron dose on altitude. However, the correlation of neutron dose and geographic (geomagnetic) latitude was not statistically significant, probably due to a small range of geographic latitudes for the measuring stations in Croatia.
Cite this paper: Vuković, B. , Sovilj, M. , Radolić, V. , Miklavčić, I. and Planinić, J. (2018) Natural Radiation Dose and Geomagnetic Effect. Journal of Geoscience and Environment Protection, 6, 172-180. doi: 10.4236/gep.2018.64010.

[1]   Bartlett, D. (2004) Radiation Protection Aspects of the Cosmic Radiation Exposure of Aircraft Crew. Radiation Protection Dosimetry, 109, 349-355.

[2]   United Nations Scientific Committee on the Effects of Atomic Radiation UNSCEAR 2000. Sources and Effects of Ionizing Radiation. United Nations, New York.

[3]   Colgan, P.A., Synnott, H. and Fenton, D. (2007) Individual and Collective Doses from Cosmic Radiation in Ireland. Radiation Protection Dosimetry, 123, 426-434.

[4]   Mertens, C.J., et al. (2016) Cosmic Radiation Dose Measurements from the RaD-X Flight Campaign. Space Weather, 14, 874-898.

[5]   Koops, L. (2017) Cosmic Radiation Exposure of Future Hypersonic Flight Missions. Radiation Protection Dosimetry, 175, 267-278.

[6]   Horwacik, T., Bilski, P., Olko, P., Spurny, F. and Turek, K. (2004) Investigations of Doses on Board Commercial Passenger Aircraft Using CR-39 and Thermoluminescent Detectors. Radiation Protection Dosimetry, 10, 377-380.

[7]   Mitaroff, A. and Silari, M. (2002) The CERN-EU High-Energy Reference Field (CERF) Facility for Dosimetry at Commercial Flight Altitudes and in Space. Radiation Protection Dosimetry, 102, 7-22.

[8]   Poje, M., Vukovic, B., Radolic, V., Miklavcic, I., Faj, D., Varga Pajtler, M. and Planinic, J. (2012) Mapping of Cosmic Radiation Dose in Croatia. Journal of Environmental Radioactivity, 103, 30-33.

[9]   Vukovic, B., Poje, M., Varga, M., Radolic, V., Miklavcic, I., Fajm, D., Stanic, D. and Planinic, J. (2010) Measurements of Neutron Radiation in Aircraft, Applied Radiation and Isotopes, 68, 2398-2402.

[10]   Baldik, R., Aytekin, H. and Erer, M. (2011) Radioactivity Measurements and Radiation Dose Assessments Due to Natural Radiation in Karabük (Turkey). Journal of Radioanalytical and Nuclear Chemistry, 289, 297-302.

[11]   Radolic, V., Vukovic, B., Stanic, D., Katic, M., Faj, Z., Suveljak, B., Lukacevic, I., Faj, D., Lukic, M. and Planinic, J. (2006) National Survey of Indoor Radon Levels in Croatia. Journal of Radioanalytical and Nuclear Chemistry, 269, 87-90.

[12]   ArcGIS software by Esr. ArcGIS and ArcMapTM (2015) Are the Intellectual Property of Esri and Are Used Herein under License.Copyright Esri. All Rights Reserved.

[13]   Neter, J., Kutner, M.H., Nachtsheim, C. and Wasserman, W. (1996) Applied Linear Statistical Models. McGraw Hill, Boston.

[14]   United Nations Scientific Committee on the Effects of Atomic Radiation UNSCEAR 2008. Sources and Effects of Ionizing Radiation. United Nations, New York.