absorption edge

absorption edge

[əb′sȯrp·shən ‚ej]
(spectroscopy)
The wavelength corresponding to a discontinuity in the variation of the absorption coefficient of a substance with the wavelength of the radiation. Also known as absorption limit.
References in periodicals archive ?
UV-VIS absorption spectroscopy yield an absorption edge in the range 300-400 nm which corresponds to a band gap energy of 3.
66 eV (about 747 nm, red-shifted) with the recent experiment [25] of an absorption edge observed at about 840 nm (about 1.
My data are spectra containing a big peak at the absorption edge and a series of smaller "near-edge" peaks.
Each element shows different characteristic absorption edge for their different electron-shell energies.
This is below the absorption edge of Fe to avoid interference from background Fe fluorescence for elements (in our study, Mn) with an absorption edge less than that of Fe and located close to the Fe absorption edge.
In glasses prepared in Au crucibles, the absorption edge is shifted to shorter wavelengths and the color of the glass is changed from red to yellowish, respectively.
Large real (f') and imaginary (f") contributions to the x-ray scattering factor arise at energies close to an elemental absorption edge.
We work to overcome semiconductor shortcomings by working close to the absorption edge [of the material]," Kost says.
For the ZnO film the percentage of transmittance in the visible region (390-800 nm) is about 80-87 % with a gradual fall near the fundamental absorption at 380 nm denotes the absorption edge occurs in the UV region.
U], according to the idea that the sharp absorption edge is enlarged by the electric fields produced by charged impurities; the third region describes the optical absorption generated by defects appearing at an energy lower than the optical gap; it is sensitive to the structural properties of the materials, being defined as the so-called Urbach tail, [E.