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02013nam a22002297a 4500 |
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|a ara
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044 |
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|b السعودية
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100 |
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|9 456169
|a الهلال، محمد الأحمد
|e مؤلف
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245 |
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|a غاز الرادون المشع وضرورة تحديد تركيزه في البيئة الجيولوجية للمدينة المنورة
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246 |
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|a Radon Gas and the Need for Determining its Levels in Al-Madinah Al-Munawwarah
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260 |
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|b مركز بحوث ودراسات المدينة المنورة
|c 2006
|g أكتوبر
|m 1427
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300 |
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|a 241 - 266
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|a بحوث ومقالات
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520 |
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|b Radon is a radioactive gas produced by the decay of radium, which results from the natural radioactive decay chains of uranium -238 and thorium -232. There are three isotopes of radon in nature, all of which decay by emitting alpha particles. They are: Rn-222, Rn-220 and Rn-219. Geology of the area under investigation plays an important role in understanding radon measurements results. Rocks that are derived from silica-rich magma such as granites and rhyolites and other acidic volcanic rocks constitute the main natural source of uranium and thorium elements which, in turn, from the main source of natural radiations including radon . When solid radium decays to from radon gas, it loses two protons and two neutrons, i.e. it emits an alpha particle (a type of radiation) which can reach people's lungs through inhalation causing probable lung cancer.
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653 |
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|a المدينة المنورة
|a البيئة الجيولوجية
|a غاز الرادون
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773 |
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|4 العلوم الإنسانية ، متعددة التخصصات
|4 التاريخ
|6 Humanities, Multidisciplinary
|6 History
|c 008
|e Journal of Al-Madinah Al-Munawwarah Research and Studies
|l 018
|m ع18
|o 0810
|s مجلة بحوث المدينة المنورة ودراساتها
|v 000
|x 1658-059
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856 |
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|u 0810-000-018-008.pdf
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930 |
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|d y
|p y
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995 |
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|a IslamicInfo
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995 |
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|a HumanIndex
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999 |
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|c 848960
|d 848960
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