نتایج جستجو برای: radioactive nuclides
تعداد نتایج: 21877 فیلتر نتایج به سال:
Radioactive decay of naturally occurring nuclides provides the basis for the nearly all quantitative temporal constraints on geophysical phenomena, from climate dynamics on scales of 10-10 yr, to planetary differentiation over 10-10 yr. In general there are few geologic problems that are not accessible by radioisotopic chronometers, partly because of the wide range of radioactive parent nuclide...
Although there are a number of reports concerning the uptake of various radioactive nuclides from surrounding water by aquatic organisms1), the quantitative informations on the transfer of radioactive substances through aquatic food chains have been scarcely obtained until now. In near future, in accordance with the rapid developement of the peaceful utilization of atomic energy in Japan, the p...
The decay characteristics of 90Sr-90Y ensure that the mother and daughter nuclides exist in radioactive equilibrium, unless they get discriminated on the basis of their chemical properties, as it happens during metabolism. Although bone is the ultimate organ of deposition, the two nuclides arrive at this target organ over different biokinetic pathways. As 90Y is not excreted, it goes through tr...
The Fukushima Daiichi disaster 11 March, 2011 is considered the largest nuclear accident since the 1986 Chernobyl disaster and has been rated at level 7 on the International Nuclear Event Scale. As different radioactive materials have different effects to human body, it is important to know the types of nuclides and their levels of concentration from the recorded mixture of radiations to take n...
Sweden belongs to an exclusive group of nine countries in the world with a forest cover greater than 65% of the land area. Forest products make a large proportion of Sweden’s net export income. Not only wood fibres but also berries and meat from the forests are important. Game hunting, reindeer farming, berries and mushroom gathering, as well as fresh water fishery, are all included in human fo...
Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly charged ions, using the TITAN facility at TRIUMF. Compared to singly charged ions, this provides an improvement in experimental precision that scales with the charge state q. Neutron-deficient Rb isotopes have been charge bred in an electron beam ion trap to q=8-12+ prior to injection into ...
Taking inventories in reactor cores is critical for understanding their radioactive source terms and establishing the relationship between activity concentration primary loop status of core’s fuel. However, there a niche which simple but accurate conditions nuclide can reliably predict fission gas activities core loop. In this study, efficient model called “Inventories Point Reactor Fission Gas...
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