atomic hydrogen


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atomic hydrogen

[ə′täm·ik ′hī·drə·jən]
(chemistry)
Gaseous hydrogen whose molecules are dissociated into atoms.
References in periodicals archive ?
The new data indicate that the WASP-12b atmosphere is composed of atomic hydrogen and helium.
The latter result is a conclusion purely from experiment, specifically the numerological deduction made initially by Balmer in 1885 and elaborated on a more physical basis by Rydberg in 1888 from wave lengths [lambda]/m of spectral lines in the visible region attributed to atomic hydrogen.
The focus of this paper will be on the latter, namely the effects of atomic hydrogen on the process of fatigue crack growth, which we will call "hydrogen-assisted fatigue crack growth (rate(s))" (HA-FCG(R)).
The failure is brittle due to the ingress of atomic hydrogen (H).
Because of the contents and internal operating conditions under active stresses, the diffusion of atomic hydrogen occurs in areas of tensile stress concentration.
The corrosion reaction creates a source of atomic hydrogen moving free in the sour atmosphere.
The theory of welding process assumes that atomic hydrogen has strong influence for welding joints quality and this is why many researchers investigate this topic.
The key to the technology is the development of a dense ceramic-metal composite (cermet) membrane that is capable of transporting atomic hydrogen at temperatures above 500 [degrees]C.
Our observations suggest that what we may be seeing during this transition is atomic hydrogen becoming completely ionized," says Fan.
When the hydrogen gas comes into contact with the surface of the metal hydride alloy, if separates into atomic hydrogen (H, not [H.
Atomic hydrogen normally exists in a "ground" state with the single electron orbiting at a specific radius.