نتایج جستجو برای: 232th and 40k
تعداد نتایج: 16827271 فیلتر نتایج به سال:
محیط اطراف مارا مقدار نسبتا کمی از رادیوهسته های پرتوزای اولیه یا با منشا کیهانی با نیمه عمر بسیار بلند دربر می گیرد. این رادیوهسته ها و محصولات واپاشی آن ها مهم ترین منبع تابش رادیواکتیو در زمین محسوب می شوند. در این تحقیق میزان حضور رادیوهسته های طبیعی را در آب و خاک رود کارون بررسی شده است. روش کار شامل: نمونه برداری، آماده سازی نمونه، طیف گیری از نمونه مجهول و مقایسه آن با نمونه استاندارد ا...
this study was conducted to determine the radioactivity concentration in soil samples of anarak-khour district located at central iran. 48 soil samples from a depth of 10-15 cm were taken from seven different sites for monitoring. the radioactivity concentration of 238u, 232th, 137cs and 40k in soil samples was determined, using a high resolution (hpge detector, p-type) γ-spectrometry by detect...
Introduction Iron ore is one of the most important natural raw materials that is widely used for manufacturing iron and steel. This type of ore contains various amounts of radionuclides; thus, exposing workers handling their extraction, transportation, and processing to radiation. Materials and Methods In this study, 12 ore samples (each mass weighing about 2 kg) were collected from the iron or...
Background: Ondo city in Ondo State Nigeria includes Ondo East and West could be described as a research city due to antecedent number of research institutes. Materials and Methods: Dose due to radioactivity content of soil samples from sixteen waste dump sites in Ondo, Southwestern Nigeria was determined using gamma-ray spectrometer in order to evaluate the radiation hazard health profile and ...
گیاهان می توانند مواد پرتوزا را به طور مستقیم از طریق فرآورده های غذایی گیاهی و به طور غیر مستقیم از طریق فرآورده های غذایی حیوانی به چرخه غذایی انسان و اکوسیستم انتقال دهند. آنها همچنین در جذب آلاینده های پرتوزای محیطی نقش دارند. پرتوزایی گیاهان در مناطق مختلف با توجه به نوع خاک، سنگ و موقعیت جغرافیایی، متفاوت است. لذا شناخت دقیق گیاهان هر منطقه اطلاعات ارزشمندی در اختیار پژوهشگران قرار می دهد...
Background: The new glasses from harmful environmental waste such as cement dust; limestone phosphate, sand and borax (Genkare) were manufactured. Investigation of the radioactivity present in these materials (Phosphate rock, cement dust, limestone, sand and borax) enables one to assess any possible radiological hazard to humankind by such materials. Materials and Methods: Fifteen samples were ...
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 ...
the activity concentrations of 235u, 232th, 226ra, 40k and 137cs in ground and surface of drinking water resources in iranian city of arak were determined by gamma ray spectrometry with ahpge detector setup, coaxial p type and 8192 channels mca. the water samples differed in radioactivity content depending on their origin and place. in the drinking water samples from aman abad, mobarak abad, an...
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