نتایج جستجو برای: natural gamma radiation
تعداد نتایج: 818838 فیلتر نتایج به سال:
Dose rates in air and at various depths in tissue produced by concentrations of natural isotopes in the ground are calcu lated for both beta and gamma radiation. Calculated gonadal "screening factors" are within k$ of the experimental values reported by the British Medical Research Council*
چکیده ندارد.
Radioactivity measurements for water, soil, and air have been completed in national international regions. The radioactivity process is randomized occurs naturally by primordial nuclides. Another case hand-made reactions which realized artificial reactions. high rate of the total dose radiation, whichever exposed to humans, originates as Natural Radioactivity. In this case, environmental are im...
Introduction: Radiation therapy is a stage of therapeutic in the management of tumors that causes normal cells damage. So, Radioprotective drugs injected before radiotherapy to reduce cell damages and death against ionizing radiation. Curcumin is an antioxidant compound. The aim of this study is to investigate the possible protective effect of curcumin against Gamma-Radiation in male rats. Meth...
The ionizing radiations are able to make either a permanent or temporarily damage in the electronic circuits. The temporary effects during irradiation can be used to detect the ionizing radiation. In this study a diode in reverse bias has been used to investigate the effects of ionization radiation on semiconductors. The variation of reverse current of diode has been monitored due to interactio...
In recent years, interest has been growing to preserve food including meat applying gamma radiation recommended by International Atomic Energy Agency to extend the shelf-life of meat retaining the organoleptic conditions as it is. In view of this point the present study aims to check the sensitivity of Acinetobacter spp. isolated from meat to gamma radiations. Seven species of Acinetobacter viz...
the aim of this study is to provide a control software system, based on monte carlo simulation, and calculations of dosimetric parameters of standard and wedge radiation fi elds, using a monte carlo method. gate version 6.1 (opengate collaboration), was used to simulate a compact 6 mv linear accelerator system. in order to accelerate the calculations, the phase-space technique and cluster compu...
The possibility of employing α-Al2O3:C (TLD-500) for estimation of gamma dose in mixed n-γ radiation fields by two peak method has investigated. It was found that the main peak can be reliably deconvoluted to two component glow peaks. The ratio of peak 2 to peak 1 in pure gamma ray radiation field (137Cs) is 1.49 whereas irradiation by Am-Be neutrons results in a ratio of 1.12. The precision of...
In 2006, the Joint Research Centre of the European Commission launched a project to map radon at the European level, as part of a planned European Atlas of Natural Radiation. It started with a map of indoor radon concentrations. As of May 2014, this map includes data from 24 countries, covering a fair part of Europe. Next, a European map of geogenic radon, intended to show 'what earth delivers'...
Introduction Radiation that has sufficient energy to remove electrons from atoms is called “ionizing radiation.” Ionization results in the production of negatively charged free electrons and positively charged ionized atoms. Ionizing radiation can be classified into two groups: photons (includes X-radiation and gamma radiation) and particles (includes alpha and beta particles and neutrons). The...
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