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 ?
While the electron density calculated utilizing the Stark broadening effect, while another line broadening such as Doppler broadening and ionic broadening is so small comparing with Stark broadening that can be neglected [5].
These methodologies include line-to-line relationships and line broadening.
The nature of the structural disorder in the alloys was studied via Urbach energy, obtained from optical absorption, and Raman spectral line broadening.
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.
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.
In her essay 'The Reality of Causes in a World of Instrumental Laws' Cartwright discusses an example from laser theory that illustrates the variety of mathematical/theoretical treatments that are applicable to a specific case and contrasts them with the unique causal story that describes the process known as quantum damping and line broadening.
The NH3 clumps are coincident with indications of star formation, including 24[micro]m infrared emission and evidence of emission line broadening increased density, and increased temperature.
There are several possible mechanisms of line broadening in plasma: self-absorption, pressure broadening, Doppler broadening, Stark broadening, etc.
When an instrument is well characterised, line broadening can be analysed without a reference specimen.