free atom

free atom

[¦frē ′ad·əm]
(atomic physics)
An atom, as in a gas, whose properties, such as spectrum and magnetic moment, are not significantly affected by other atoms, ions, or molecules nearby.
References in periodicals archive ?
In the corona, the interaction between free atoms or ions with condensed matter results in the production of highly ionized species, like FeXXV [23,24], since condensed matter has the ability to maintain a higher electron affinity than a free atom.
Finally, the corrected profiles were normalized to 23.200 for BaO and 26.434 for BaS electrons in the range of 0 to +5 a.u., being the area of free atom Compton profile [22] in the given range.
While we must not deemphasise personal responsibility, we have to remember that individuals are not free atoms: They are the products of social relations.
A second important feature is that the magnecular bond disappears at the combustion temperature, as it is typically the case for all magnetic bonds, thus allowing the combustion among free atoms, rather than among molecules.
Up until now, this phenomenon could only be studied with free atoms (and with the use of special symmetries).
The sixteen contributions that make up the main body of the text are devoted to predication of photoelectrochemical properties of selected molecules by their structure, the dependence of some thermodynamic characteristics upon intitial spatial-energy parameters of free atoms, research progress on carbon nanotube-polymer composites, and a wide variety of other related subjects.
Analysis of the scattered light suggests phase IV contains both hydrogen molecules and free atoms. Chris Pickard, a theorist at University College London, says it is probably arranged in hexagonal sheets of atoms separated by unbound molecules.
For graduates, advanced undergraduates, and professionals in physics and chemistry, Smirnov (Institute for High Temperatures, Russian Academy of Sciences, Russia) sets out the fundamental concepts of statistical physics and physical kinetics, illustrating them with contemporary problems for the simplest systems of bound or free atoms. He compares different methods of describing some systems and phenomena in order to reveal various aspects of the problems under consideration.
The theory of the quadratic Stark shift in free atoms has been described in detail by Angel and Sandars [19].
In ICP-MS, for example, a sample is decomposed by intense heat into a cloud of hot gases containing free atoms and ions of the element of interest.
Since the 1950s, NASA and the Air Force have sought ways to store free atoms within hydrogen lattices until their energy is needed.