excited state


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Excited state

In quantum mechanics, a stationary state of higher energy than the lowest stationary state or ground state of a particle or a system of particles. Customarily, only bound stationary states, which generally are at most denumerably infinite in number, are spoken of as excited, although the formal quantum theory often treats the noncountable unbound stationary states on an equal footing with the bound states. See Ground state, Metastable state

McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.

excited state

See energy level; excitation.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

excited state

[ek′sīd·əd ′stāt]
(quantum mechanics)
A stationary state of higher energy than the lowest stationary state or ground state of a particle or system of particles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The energies of LUMO of three dye molecules are lower than the conduction band energy of Ti[O.sub.2] (-4.00 eV), which indicates that electrons can be successfully injected into Ti[O.sub.2] from the excited state of dye molecules.
Computational Prediction of Electronic and Photovoltaic Properties of Anthracene-Based Organic Dyes for Dye-Sensitized Solar Cells
Caption: Figure 4: Charge distribution for on-center donor in the ground state (a, c, e, g) and in the first excited state (b, d, f, h) for [gamma] = 0,5, 10, 15 in circular QR.
Energy Spectrum of Shallow Donor in Elongated InAs/GaAs Volcano-Shaped Quantum Dot
To calculate the orbital excited state masses (1P-5P, 1D- 4D, 1F-2F), we have considered all possible isospin splitting and all combinations of total spin S and total angular momentum J.
A New Model for Calculating the Ground and Excited States Masses Spectra of Doubly Heavy [XI] Baryons
where [[nu].sub.a] and [[nu].sub.f] are the wavenumbers of absorption and fluorescence transition, respectively, h is the Planck's constant, c the speed of light, [[mu].sub.e] and [[mu].sub.g] are the excited state and ground state dipole moments of a solute molecule, [a.sub.0] is the cavity.
Quinquangulin and Rubrofusarin: A Spectroscopy Study
The Examiner reported: "The impulse to shout apparently restored his speech at once and although he was in a somewhat excited state he was able to converse freely afterwards."
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The difference in the absorption spectra position can be explained by the fact that the charge of the ThT molecule is irregularly distributed between benzothiazole and aminobenzene rings in the ground and excited states. The excited state generated when the ThT molecule absorbs a light quantum is nonequilibrium.
Photophysical Properties of Fluorescent Probe Thioflavin T in Crowded Milieu
The efficiency of light emission of both bioluminescent and chemiluminescent reactions is described in terms of quantum yield, which is controlled by three factors [1, 10, 11]: chemical yield of the ground state reaction, chemiexcitation yield of the singlet excited state product, and finally the fluorescent quantum yield of the emitter.
Theoretical Analysis of the Effect Provoked by Bromine-Addition on the Thermolysis and Chemiexcitation of a Model Dioxetanone
Hackles raised means an adrenaline surge, which means he is in an excited state. If you are pulling him out because you feel he is getting a bit too excitable and overwhelming the other dog, try to do it calmly and reward him, releasing him after a short time so he knows he can resume play once the 'jet engines' have cooled a bit.
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The photosensitizer can be activated to singlet excited state by visible light absorption and then partial excited-state molecules convert into longer-lived triplet state through intersystem crossing.
Spectroscopic Characterizations of Semiquinone Anion Radical Formation and Autosensitized Photooxidation for Elsinochrome A
These paths may proceed through the formation of radical and triplet electronic states, oxidation of the excited state, etc.
Pigments and dispersions for coatings and graphic arts applications: part 1

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