WJNST  Vol.2 No.1 , January 2012
U and Th Determination in Natural Samples Using CR-39 and LR-115 Track Detectors
ABSTRACT
In this work, a simple and accurate method for U and Th determination in natural samples is proposed. This method is based on simplified calculations of the efficiency factor of the solid state track detector using a thin source approach. Samples were firstly saluted using a concentrated H2SO4 acid and then distributed on a glassy slide where the thickness of the sample was about 7 μm. CR-39 and LR-115 track detectors were exposed to the thin layer of the natural samples for few days and then the track densities were obtained. By the mean of originated track densities in CR-39 and LR-115 as a function of exposure time and sample weight, the concentration of U and Th in Bq/kg were obtained by the thin source approach of SSNTD.

Cite this paper
S. Eman, S. Nageeb and A. El-Sersy, "U and Th Determination in Natural Samples Using CR-39 and LR-115 Track Detectors," World Journal of Nuclear Science and Technology, Vol. 2 No. 1, 2012, pp. 36-40. doi: 10.4236/wjnst.2012.21006.
References
[1]   T. EL-Zakla, H. A. Abdel-Ghny and A. M. Hassan, “Natural Radioactivity of Some Local Fertilizers,” Romanian Journal of Physics, Vol. 52, No. 5-7, 2007, p. 731.

[2]   H. Florou, K. Kehagia, C. H. Chaloulou, V. Koukouliou and C. H. Lykomitrou, “Determination of Radionuclide in Mystiques Galloprovicialis by Alpha and Gamma-Spec- troscopy,” Mediterranean Marine Science, Vol. 5, No. 1, 2004, p. 117.

[3]   C. A. Simion, C. Cimpeanu, C. Barna and E. Duta, “The Uranium Determination in Commercial Iodine Salt,” Romanian Journal of Physics, Vol. 51, No. 7-8, 2006, p. 845.

[4]   N. W. El-Dine, A. El-Shershaby, F. Ahmed and A. S. Abdel-Haleem, “Measurement of Radioactivity and Radon Exhalation Rate in Different Kinds of Marbles and Granites,” Applied Radiation and Isotopes, Vol. 55, 2001, p. 853. doi:10.1016/S0969-8043(01)00107-5

[5]   T. A. Salama, U. Seddik, T. M. Dsoky, A. Morsy and R. Asser, “The Influence of the Nature of Soil and Plant and Pollution on the 238U, 232Th, 222Rn and 220Rn Concentrations in Various Natural Honey Samples Using Nuclear Track Detectors: Impact on the Adult Consumers,” Indian Academy of Sciences, Vol. 62, No. 2, 2006, p. 269.

[6]   H. Surbeck, “Alpha Spectrometry Sample Preparation Using Selectively Adsorbing Thin Films,” ICRM Conference on Low Level Radioactivity Measurement Techniques, Mol, Belgium, 18-22 October, 1999, pp. 97-100.

[7]   M. M. El-Hawary, M. M. Mansy, A. Hussein, A. A. Ammar and A. R. El-Sersy, “Construction of a Charged Particle Irradiation Chamber for the Use with Plastic Detectors,” Radiation Physics and Chemistry, Vol. 54, 1999, p. 547. doi:10.1016/S0969-806X(98)00292-8

[8]   H. El-Samman, M. Mansy, A. Hussein, M. El-Hawary and A. R. El Sersy, “Registration Efficiency of Some SSNTDs with Source Area Included,” Nuclear Instruments and Methods in Physics Research Section B, Vol. 155, 1999, p. 426. doi:10.1016/S0168-583X(99)00485-1

[9]   “Uranium Series ICRP 68 Dose Coefficients for Workers,” 2003. http://www.wise-uranium.org/rdfi68.html

[10]   National Service Center for Environmental Publications (NSCEP), 2007. http://www.epa.gov/radiation/heast/docs/heast2

[11]   UNSCEAR (United Nations Scientific Committee on the Effects of Atomic Radiation), “Sources Effects and Risks of Ionizing Radiation,” Report to the General Assembly, With Annexes, United Nations, New York, 1988.

[12]   T. A. El-Daly and A. S. Hussein, “Natural Radioactivity Level in Environmental Samples in North Western Desert of Egypt,” Proceedings of the 3rd Environmental Physics Conference, Aswan, Egypt, 19-23 February 2008, pp. 79-88.

 
 
Top