نتایج جستجو برای: radioactive decay period
تعداد نتایج: 580142 فیلتر نتایج به سال:
Abstract Certain nuclear isomers are well known to affect nucleosynthesis with important observable consequences (e.g., 26 Al and 180 Ta). We study the impact of in context rapid neutron capture process ( r -process) nucleosynthesis. demonstrate that dynamically populated some far from thermal equilibrium; this makes them astrophysical isomers, or “astromers.” compute thermally mediated transit...
Based on the last presented reports of UNSCEAR, inhalation of radon gas and its short-lived decay products is a major contributor to the human exposure from natural radioactivity. Lung cancer is the known effect on human health from exposure to radon in air. Radon is found in outdoor air of buildings of all kinds. The main important isotope of radon is 222Rn. Radon (222Rn) is a noble gas...
BACKGROUND AND PURPOSE Endovascular treatment of aneurysms with coils, a less invasive alternative to surgery, is too often associated with recurrences. In a canine model, recanalization after coil embolization can be inhibited by in situ beta radiation. METHODS Radioactive platinum coils were produced by immersion in a (32)P-oligodeoxynucleotide solution. In vitro and in vivo (32)P-oligodeox...
Many contaminants exhibit decay (radioactive decay, consumed by bacteria, heat loss or evaporation through the surface, dissolution by turbulence). For a non-symmetric river with non-reversing flow, the effects of decay are allowed for in specifying the diffusion centre i.e. the optimal postion for a steady discharge. Three families of exact solutions are presented that illustrate the effect on...
Background and purpose: Radon is a colorless inert gas which decay products are the main component of natural radioactive elements that are naturally produced in under layers of earth crust by decay of radium and uranium. It enters through buildings via gaps and cracks. Alpha particle emissions as a radon gas decay product can increase the incidence of lung cancer in human. Every person spends ...
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