electron transition

electron transition

[i′lek‚trän tran′zish·ən]
(quantum mechanics)
Change of an electron from one state to another, accompanied by emission or absorption of electromagnetic radiation.
References in periodicals archive ?
The value of this measurement is called the absorbance and corresponds to a specific amount of energy required for the electron transition. (13) Across a continuum of wavelengths and corresponding absorbances/reflections for a metal in a crystal field, spectroscopic information can be collected to create a reflectance spectra--the reflected and absorbed color profile of the metal in its environment.
The shorter wavelength region (250-400 nm) is assigned to the aromatic [pi]-[[pi].sup.*] electron transition of BPI or DPI with an additional linker, whereas the longer wavelength region with high-intensity absorption (420-650 nm) corresponds to the Bodipy unit with some intramolecular charge transfer transition.
The electron transition of Tetrabromophenol blue is from H-1 [right arrow] L, and the excited states S1 and S3 are from H [right arrow] L and H [right arrow] L+1, respectively.
All samples exhibit optical absorption below 400 nm which is attributed to the band-to-band electron transition in the Ti[O.sub.2] nanocrystals related to its band gap energy near 3.1 eV.
A broad band in the violet-to-orange spectral range is thought to be caused by an electron transition between a [Mn.sup.2+] d-electron level and an unoccupied ZnS energy band (Prof.
The same electron transition phenomenon appears in a-K@1-acenes salt, and the maximum electronic cloud concentrates on C-K bond, therefore the obvious charge transition occurs there.
The frequency of the semiconductor laser was stabilised by locking it to a specific electron transition of a rubidium atom.
From the discussion above, we conclude that the recorded splitting of the Ba [N.sub.45][O.sub.23][P.sub.1] line for both the c(2 x 2) and (2 x 2) structures can be assigned to the smaller observed width of the Auger electron transition. In that sense, the lineshape of the Auger Ba [N.sub.45][O.sub.23][P.sub.1] line may reflect the order of the barium overlayer.
When a direct band gap exists, the absorption coefficient of electron transition depends on the energy of incident photon according to (2).
On the other hand, although a dynamical conductivity formula for superconducting materials could be obtained from Eliashberg theory [13] where the electron-phonon interaction is described by the spectral function, the result did not contain the distribution function for phonons, so the phonon emissions and absorptions as well as photon absorptions and emissions in all electron transition processes could not be presented in an organized manner.
Whereas, to break the limitation of optical metamaterials, electron transition between energy levels in atoms might be a useful alternative as a unit to achieve EM resonance in visible optical region [13].
Then the nature and the energy of vertical electron transition (the first three singlet-singlet electron transition) and electron density diagrams of molecular orbitals are obtained at the B3LYP/3-21G* optimized ground-state geometries.

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