line broadening

line broadening

The production of broadened spectral lines by various effects. The natural width of a spectral line is determined by quantum mechanical uncertainty. Other factors can, however, produce extra line width, including rapid rotation of a celestial body, Doppler broadening, pressure broadening, and the Zeeman effect. Considerations of the line profile can give information about the physical conditions of celestial objects.

line broadening

[′līn ‚brȯd·ən·iŋ]
(spectroscopy)
An increase in the range of wavelengths over which the characteristic absorption or emission of a spectral line takes place, due to a number of causes such as collision broadening and Doppler broadening.
References in periodicals archive ?
Due to the future, two-sided line broadening the replacement of both new construction buildings shall be designed for a total of six lanes and two hard shoulders.
Jefferies and Orrall continue, "To avoid the necessity of considering such unacceptably high and discordant temperatures, the hypothesis is frequently made that the line broadening is due both to thermal motions of atoms and to mass motions of small prominence elements having a Maxwellian distribution of velocities.
Collisional line broadening with condensed matter could greatly impact the line widths under observation.
Application of the obtained formula to line broadening phenomena in [I.
From this line broadening analysis of the (002) reflection in the fiber of drawn 40, the average crystallite length of the c-axis was estimated to be about 50 nm and from [D.
Mintels report includes an intense examination of the overall market, covering important issues such as the migration of sales to Wal-Mart, product line broadening through acquisitions, and market size, segmentation, and trends.
There are several possible mechanisms of line broadening in plasma: self-absorption, pressure broadening, Doppler broadening, Stark broadening, etc.
observed] by subtracting the instrumental line broadening [DELTA][[lambda].
When an instrument is well characterised, line broadening can be analysed without a reference specimen.
In sputter deposited nickel layers, three different methods for diffraction line broadening analysis yield identical results.
Walter, X-ray diffraction line broadening analysis of galena powders: a clue to some practices on mineral crushing in ancient Egypt, Materials Science Forum 321-324, 1062-1067 (2000).
Wilson, On variance as a measure of line broadening in diffractometry: Effect of distribution of sizes on the apparent crystallite size, J.