Drinking water plays a major role regarding quality of human life because polluted water is the main cause of many types of diseases. Besides other pollutants, high concentration of uranium above a certain level in dr...Drinking water plays a major role regarding quality of human life because polluted water is the main cause of many types of diseases. Besides other pollutants, high concentration of uranium above a certain level in drinking water is also hazardous. As water and food are the main sources of uranium intake, it is absolutely imperative that their level of concentrations is monitored regularly for safety of the general public. In this regard, trace amount of uranium in drinking water samples collected from different locations of Faisalabadcity has been carried out using Neutron Induced Fission Track Technique. The water samples along with the standard of known uranium concentration were poured and dried over Lexan track detectors and then irradiated with thermal neutrons in Reactor. After etching, the tracks produced in the detectors as a result of 235U (n, f) reaction were counted under an optical microscope. The uranium concentration was determined by counting and comparing the observed fission track density in the samples and the standard. The observed uranium concentration in the studied water samples varied from (1.04 ± 0.30) μg·L-1 to (21.08 ± 2. 95) μg·L-1 with an average value of (7.39 ± 1.30) μg·L-1 and is found to be within safe limits as far as uranium related health hazards are concerned.展开更多
The thermal neutron capture gamma ray facility at Pakistan Research Reactor (PARR-1) is being used forthe re-estimation of various properties like capture cross-sections, resonance integral, absolute gamma intensities...The thermal neutron capture gamma ray facility at Pakistan Research Reactor (PARR-1) is being used forthe re-estimation of various properties like capture cross-sections, resonance integral, absolute gamma intensities, etc.of different isotopes. The data for gamma ray transitions from the capture of thermal neutrons by 55Mn are not ingood agreement specifically below 2 MeV. So there is a need to re-estimate its intensities with better accuracy. Analyticalgrade MnCl2 powder and high purity Mn metal pieces were used in this study. Standard 152Eu and 60Co radioactivesources as well as thermal neutron capture γ-rays in chlorine were chosen for efficiency calibration. The k0standardization technique was applied for these measurements to eliminate systematic errors in efficiencies. Chlorinealso acted as a comparator in k0- factor calculations. The results have been tabulated for the main gamma rays from56Mn in the low as well as in the medium energy regions. The absolute intensities are in good agreement with most ofthe reported values.展开更多
文摘Drinking water plays a major role regarding quality of human life because polluted water is the main cause of many types of diseases. Besides other pollutants, high concentration of uranium above a certain level in drinking water is also hazardous. As water and food are the main sources of uranium intake, it is absolutely imperative that their level of concentrations is monitored regularly for safety of the general public. In this regard, trace amount of uranium in drinking water samples collected from different locations of Faisalabadcity has been carried out using Neutron Induced Fission Track Technique. The water samples along with the standard of known uranium concentration were poured and dried over Lexan track detectors and then irradiated with thermal neutrons in Reactor. After etching, the tracks produced in the detectors as a result of 235U (n, f) reaction were counted under an optical microscope. The uranium concentration was determined by counting and comparing the observed fission track density in the samples and the standard. The observed uranium concentration in the studied water samples varied from (1.04 ± 0.30) μg·L-1 to (21.08 ± 2. 95) μg·L-1 with an average value of (7.39 ± 1.30) μg·L-1 and is found to be within safe limits as far as uranium related health hazards are concerned.
文摘The thermal neutron capture gamma ray facility at Pakistan Research Reactor (PARR-1) is being used forthe re-estimation of various properties like capture cross-sections, resonance integral, absolute gamma intensities, etc.of different isotopes. The data for gamma ray transitions from the capture of thermal neutrons by 55Mn are not ingood agreement specifically below 2 MeV. So there is a need to re-estimate its intensities with better accuracy. Analyticalgrade MnCl2 powder and high purity Mn metal pieces were used in this study. Standard 152Eu and 60Co radioactivesources as well as thermal neutron capture γ-rays in chlorine were chosen for efficiency calibration. The k0standardization technique was applied for these measurements to eliminate systematic errors in efficiencies. Chlorinealso acted as a comparator in k0- factor calculations. The results have been tabulated for the main gamma rays from56Mn in the low as well as in the medium energy regions. The absolute intensities are in good agreement with most ofthe reported values.
