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"IBM" spelled out using 35 xenon atoms. IBM in atoms was a demonstration by IBM scientists in 1989 of a technology capable of manipulating individual atoms. [1] A scanning tunneling microscope was used to arrange 35 individual xenon atoms on a substrate of chilled crystal of nickel to spell out the three letter company initialism. It was the ...
Under some definitions, the value of the radius may depend on the atom's state and context. [1] Atomic radii vary in a predictable and explicable manner across the periodic table. For instance, the radii generally decrease rightward along each period (row) of the table, from the alkali metals to the noble gases; and increase down each group ...
Thermal radiation—effective ground range GR / km: Fourth degree burns, Conflagration: 0.5 2.0 10 30 Third degree burns: 0.6 2.5 12 38 Second degree burns: 0.8 3.2 15 44 First degree burns: 1.1 4.2 19 53 Effects of instant nuclear radiation—effective slant range 1 SR / km: Lethal 2 total dose (neutrons and gamma rays) 0.8 1.4 2.3 4.7
The xenon atom trapped in the fullerene can be observed by 129 Xe nuclear magnetic resonance (NMR) spectroscopy. Through the sensitive chemical shift of the xenon atom to its environment, chemical reactions on the fullerene molecule can be analyzed. These observations are not without caveat, however, because the xenon atom has an electronic ...
Xenon-136 is an isotope of xenon that undergoes double beta decay to barium-136 with a very long half-life of 2.11 × 10 21 years, more than 10 orders of magnitude longer than the age of the universe ((13.799 ± 0.021) × 10 9 years). It is being used in the Enriched Xenon Observatory experiment to search for neutrinoless double beta decay.
The xenon atom trapped in the fullerene can be observed by 129 Xe nuclear magnetic resonance (NMR) spectroscopy. Through the sensitive chemical shift of the xenon atom to its environment, chemical reactions on the fullerene molecule can be analyzed. These observations are not without caveat, however, because the xenon atom has an electronic ...
If an atom is excited to this state, which occurs roughly every thousand cycles, the atom is then free to decay either the =, light coupled upper hyperfine state, or the = "dark" lower hyperfine state. If it falls back to the dark state, the atom stops cycling between ground and excited state, and the cooling and trapping of this atom stops.
Xenon-135 (135 Xe) is an unstable isotope of xenon with a half-life of about 9.2 hours. 135 Xe is a fission product of uranium and it is the most powerful known neutron-absorbing nuclear poison (2 million barns; [1] up to 3 million barns [1] under reactor conditions [2]), with a significant effect on nuclear reactor operation.
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