Determination the concentrations of radon gas and exhalation rate in some phosphate fertilizer using CR-39 track detector

الملخص EN

The aim of this research is to measure the concentrations of radon gas for nine kinds of imported fertilizers samples that are widely used due to what they can cause of an increment in natural radioactive level of soil, and that will affect the increase in the environmental contamination level with radiation.

The results of the research show, the concentrations of radon gas CRn ranges from 161.9-251.98 Bqm-3 with the average value 208.01±32.8 Bqm-3, the surface exhalation rates for radon gas ?x ranges from 0.249-0.388 Bqm-2h-1 with the average value 0.320±0.06Bqm-2h-1, the mass exhalation rates for radon gas Em ranges from 0.183-0.285 Bqkg-1h-1 with the average value 0.235±0.04Bqkg-1h-1, the concentrations of radium gas CRa ranges from 0.365-0.57 Bqkg-1 with the average value 0.47±0.07 Bqkg-1 and alpha index Iα ranges from 0.0018-0.0029 with the average value 0.0023±0.0004.

From these results, the highest existence of a significant increase in the concentrations of radon gas in mono-ammonium phosphate Jordan1 sample, but the lowest concentration of radon gas in ammonium phosphate Iran sample.