Ví dụ về việc sử dụng These isotopes trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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These isotopes are known as alpha nuclides.
In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction.
I have developed a device that, on a very small scale,can produce these isotopes.
The variable proportions of these isotopes act like a fingerprint,” Schönbächler says.
These isotopes differ from each other in the number of uncharged particles(neutrons) in the nucleus.
While devising their study, the researchers realized that these isotopes could help them solve the core-leaking question.
These isotopes are used in positron emission tomography, a technique used for medical imaging.
Instead of requiring multi-million-dollar facilities I have developed a device that, on a very small scale,can produce these isotopes.
The most stable of these isotopes are 49V with a half-life of 330 days, and 48V with a half-life of 16.0 days.
The atomic number of carbon is 6, which means that every carbon atom has 6 protons,so that the neutron numbers of these isotopes are 6, 7, and 8 respectively.
These isotopes had been created by the cosmic rays striking the rock and had been hiding beneath the ice for more than a million years.
While they are less prevalent than either caesium-133 or caesium-137, these isotopes have the advantage of being produced solely from anthropogenic sources.[84].
Both these isotopes are produced from rare einsteinium(253Es and 255Es respectively), that therefore limits their availability.
All three are radioactive, emitting alpha particles,with the exception that all three of these isotopes have small probabilities of undergoing spontaneous fission, rather than alpha emission.
These isotopes are very difficult to separate, and more cost-effective ways of obtaining fissile material exist(e.g. uranium enrichment or dedicated plutonium production reactors).[15].
The relative atomic mass(a weighted average,weighted by mole-fraction abundance figures) of these isotopes is the atomic weight listed for the element in the periodic table.
The concentrations of these isotopes are still usually low compared to naturally occurring radioactive noble gases such as 222Rn.
A reliable way of detecting art forgeries is to test for cesium-137 andstrontium-90 as these isotopes did not exist in nature prior to the first use of nuclear weapons in 1945.
These isotopes are extremely difficult to separate, and more cost-effective ways of obtaining fissile material exist(e.g., uranium enrichment or dedicated plutonium production reactors).[18].
Since the 129-Xenon is produced by the radioactive decay of 129-Iodine, these isotopes indicate thatthe ancient part of mantle was formed during the first 100 million years of the Earth's evolution.
Both of these isotopes, especially 248Cm, have a longer half-life(3.48×105 years) and are much more convenient for carrying out chemical research than 242Cm and 244Cm, but they also have a rather high rate of spontaneous fission.
With the development of AMS in the 1980s it became possible to measure these isotopes precisely enough for them to be the basis of useful dating techniques, which have been primarily applied to dating rocks.
Alpha process elements(or alpha elements) are so-called since their most abundant isotopes are integer multiples of four,the mass of the helium nucleus(the alpha particle); these isotopes are known as alpha nuclides.
Uranium enriched in uranium 235 or uranium 233' means uranium containing uranium 235 or uranium 233 orboth in an amount such that the abundance ratio of the sum of these isotopes to isotope 238 is greater than the ratio of isotope 235 to isotope 238 occurring in nature.
While they are less prevalent than either caesium-133 or caesium-137, these bellwether isotopes are produced solely from anthropogenic sources.[97].
How could both lavas- one at the top and one at the problem of the Canyon-be the same age based on these parent and daughter isotopes?
Due to the relatively long half-life of these Pu isotopes, these wastes from radioactive decay of bomb core material would be very small, and in any case, far less dangerous(even in terms of simple radioactivity) than the Pu-239 itself.
In order to explain these exceptionally high nitrogen isotope ratios, Jaouen and collaborators decided to use a novel isotope technique.
But these unstable isotopes later decayed into He-3 and Li-7, as above.
These variants are known as isotopes of that element.