Measurement of Natural Radioactivity Levels for Some Milk Products Samples available in Yemen by Gamma Spectrometry

Wail Mohammed Saeed Al-Sharabi

Abstract


The aim of this study is to know how much the some imported and produced milk, and Milk products are contaminated with naturally occuring and man- made radionuclide as Cesium. Four samples of baby food and Seven samples of cheese and cream were collected. They are the most consummed in Yemen. These Samples were prepared in the laboratory, sieved through a fine mesh, well sealed in standard Marinelli beakers (30ml) for about four weeks in order to establish secular equilibrium between Th232 and Ra226 with their progeny. Gamma ray spectroscopy is used to analyze the samples and the concentrations of radioisotopes were determined in Bq/kg by using hyper- purity germanium (HPGe) detector Canberra p-type (model) 707 with a relative efficiency of 30% and energy resolution is of 1.85 keV .

the average concentrations of Th232 , Ra226 and K 40 were found to be concentrations of 6.14, 23.33 and 184.65 Bq/kg respectively in a baby food samples, and 0.469,

0.368 and 21.7 Bq/kg, in cheese and cream. Some important coifficient were also determined such as the Internal hazard index (Hin). Finally, the measured activity concentrations for these radionuclide were compared with the reported data obtained from similar foodstuffs consumed in other countries and with International references value. The value of the average activity concentration of the radionuclides Th232 , Ra226 measured in baby food samples are higher than the international values, but it is lower for K 40 in all samples. The results also showed that the internal hazard coifficient (Hin ) in all samples lower than one (< 1) , then don't consider any risks on the human's health.


Keywords


Radionuclide Concentrations, Milk Products , Radiation dose, the Internal hazard index , and high-purity germanium (HPGe) detector.

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DOI: http://dx.doi.org/10.52155/ijpsat.v24.2.2575

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