نتایج جستجو برای: natural radioactivity hazard

تعداد نتایج: 552402  

Journal: :Journal of Marine Science and Engineering 2022

Marine sediment samples were collected along the Jeddah coast, Red Sea, Saudi Arabia, in order to assess radiation hazards and exposure human marine living organisms. Using collaborative techniques, grain size, mineralogical characteristics, natural radioactivity investigated. To examine influence of characteristics over distribution measured radionuclides, resulting data statistically processe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان خراسان رضوی - دانشکده علوم پایه 1389

رادون ماده ای پرتوزا است که در زنجیره واپاشی اورانیوم تولید می شود. رادون به عنوان دومین عامل سرطان ریه پس از سیگار شناخته می شود. بیش از نیمی از تابش دریافتی انسان ها ناشی از تنفس گاز رادون است. خاک منبع اصلی تولید رادون است. سنگهای آذرین ( مانند گرانیت و شیل های سیاه) و سنگ های دگرگونی (مانند گنایس و شیست) قابلیت بیشتری در تولید رادون دارند. حاشیه غرب تا جنوب محدوده شهر مشهد سازند آذرین دارد....

The present paper measures natural radioactivity in different areas of Wassit governorate, using (HPGe) detector. Gamma spectrum analysis for each sample along with caululated specific activity show that the average concentrations of U-238, Th-232, and K-40 have been 19.420±4.7 Bq/kg, 18.487±5.05 Bq/kg, and 204.266±46.9 Bq/kg respectively, which is lower than the worldwide average value. While ...

Journal: Pollution 2017

The present paper measures natural radioactivity in different areas of Wassit governorate, using (HPGe) detector. Gamma spectrum analysis for each sample along with caululated specific activity show that the average concentrations of U-238, Th-232, and K-40 have been 19.420±4.7 Bq/kg, 18.487±5.05 Bq/kg, and 204.266±46.9 Bq/kg respectively, which is lower than the worldwide average value. While ...

Journal: :Nuclear Technology & Radiation Protection 2023

This study is aimed at assessing radiation hazards associated with natural radioactivity in common building materials used Ho Chi Minh City, Vietnam. Thirty-six samples from eighteen types of were collected to measure activity concentrations using the gross alpha/beta counting system and gamma-ray spectrometry. The alpha beta ranged 94.7 ? 31.3 1045.1 112.3 Bqkg-1 104.9 4.7 834.4 37.1 Bqkg-1, r...

Journal: :IOP conference series 2022

Abstract Soil and sand samples were collected from eight different locations in the Al-Dakhiliya governorate, Sultanate of Oman to determine evaluate natural artificial radioactivity levels. The activity concentrations radionuclides 137 Cs, 226 Ra, 40 K, 235 U 228 Ac measured using high resolution gamma-ray spectroscopy detectors (HPGe detectors). In addition, radiation hazard indexes evaluated...

Journal: :international journal of environmental research 2011
s. dragicevic d. filipovic s. kostadinov r. ristic i. novkovic

the territory of serbia is vulnerable to various types of natural hazards and the risk is not equal across the entire territory; it varies depending on the type of hazard and the expected potential for damage. the first aim of this research was to determine the geographical distributions of the major types of natural hazards. seismic hazards, landslides, rock falls, floods, torrential floods...

Journal: :iranian journal of radiation research 0
r. keser department of physics, faculty of sciences and arts, rte university, 53100, rize, turkey f. korkmaz görür department of physics, faculty of sciences and arts, abant i̇zzet baysal university, 14280, bolu, turkey n.t. okumusoğlu department of physics, faculty of sciences and arts, ondokuz mayıs university, samsun, turkey n.t. okumusoğlu department of physics, faculty of sciences and arts, ondokuz mayıs university, samsun, turkey

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...

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