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

excited state

See energy level; excitation.

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.
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.
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.
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.
For gas (see Figure 2(b)), the strongest oscillator strength of Tetrabromophenol blue is the excited state S2, and the oscillator strength is 0.0072.
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.
To determine the streamer structure, direct imaging of excited state [N.sub.2] transitions near the [N.sub.2]([C.sup.3][[PI].sub.u] [right arrow] [B.sup.3][[PI].sub.g]) transition at 337.1 nm was performed simultaneously with the 0(3[p.sup.3]P [right arrow] 3[s.sup.3]S) imaging by using the unfiltered reflection from the dichoric beam splitter.
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."
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.
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.
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.
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.
These paths may proceed through the formation of radical and triplet electronic states, oxidation of the excited state, etc.