toward march 1970 up to may 1972 it was monthly measured the radium quantity, available in, tehran milk, fortunate1y the results were in accordance to a reasonable value. the only remarkable point was that in wintertime, the indio activity decreased to minimum of 0.02 pci/lit, and in spring time it went up to a maxi­mum of 0.09 pci/lit. the next note worthy point was observed in a special conta...

Determinations of specific activity concentrations for Uranium-238, Thorium-232 and Potassium-40 in 10 commercial phosphate fertilizers samples from various countries (Iraq, Iran, Jordan, Kingdom Saudi Arabia, Italy Turkey) were accomplished by the use high purity germanium detector device. Radiation hazard indices [(Annual Effective Dose Equivalent) in, (Annual out, Equivalent Activity Radium,...

In this study, we evaluated the activity concentration of natural radionuclides (226Ra, 232Th and 40K) for fifteen (15) different brands of tile samples used for building purposes in Nigeria. The tile samples were analyzed using High purity Germanium gamma detector. The mean activity concentrations of 226Ra, 232Th, and 40K were observed to be 61.1 ± 5.5 Bq/kg, 70.2 ± 6.08 Bq/kg and 514.7 ± 59.8...

abstract background: the radiological impact of the use of phosphate fertilizers in soil is due to the internal irradiation of the lung by the alpha particles, short lived radon-thoron progeny and the external irradiation of the body by gamma rays emitted from radionuclides in situ. this paper describes the results of gamma spectrometric measurements of the concentration of the natural radionuc...

Radioactivity of terrestrial radionuclides Ra, Th and K in phosphate rock samples has been measured using gamma ray spectrometry system with an HPGe detector. The samples showed fairly high mean concentrations, 410±39 Bq.kg of Ra, 7.9±0.95 of Th and 37.6±4 of K. Mean absorbed gamma dose rate of 181.9±20 nGy.h was measured in air. Assessment of radiological hazards was made by calculating radium...

milligram. As representatives in the British Empire "of the Radium Beige (Union Miniere du Haut Katanga), we would like to have an opportunity of correcting this statement. Previous to the discovery of the rich ores in the Belgian Congo, the standard price for radium element was $110 per milligram, and this price was reduced following the production of radium from the Congo ore to $70, equivale...

Background: Measurement of the radiation dose distribution is important in assessing the health risk a population and serve as reference in documenting changes to environmental radioactivity in soil due to man-made activities. Materials and Methods: The activity concentration of 238U, 232Th and 40K in soil samples obtained from different locations in Ajaokuta Local Government area was measured ...

background: the radioactivity levels in sediment and rock samples of i̇kizdere and kaptanpaşa valley have been determined. to our knowledge, there seems to be no information about radioactivity level in the i̇kizdere and kaptanpaşa valley sediments and rocks so far. materials and methods: the average radium equivalent activity (raeq), the total absorbed dose rate (d), the external risk index (hex...

the radionuclides 226ra, 232th and 40k concentrations measured as well as radiological parameters, for 14 granite samples that use in iran as building material were calculated. the measurements of the radioactivity concentrations were carried out at nuclear physics laboratory university of tabriz. this subject is important in environmental radiological protection, since granites are extensively...