excited state


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state

 [stāt]
condition or situation.
alpha state the state of relaxation and peaceful awakefulness associated with prominent alpha brain wave activity.
anxiety state the condition of experiencing undue anxiety, as in anxiety disorders.
excited state the condition of a nucleus, atom, or molecule produced by the addition of energy to the system as the result of absorption of photons or of inelastic collisions with other particles or systems.
ground state the condition of lowest energy of a nucleus, atom, or molecule.
persistent vegetative state a condition of profound nonresponsiveness in the wakeful state caused by brain damage at whatever level and characterized by a nonfunctioning cerebral cortex, the absence of any discernible adaptive response to the external environment, akinesia, mutism, and inability to signal; the electroencephalogram may be isoelectric or show abnormal activity. Vegetative states raise ethical questions regarding appropriate care, use of resources, and allowing a patient to die.
refractory state a condition of subnormal excitability of muscle and nerve following excitation.
resting state the physiologic condition achieved by complete bed rest for at least 1 hour.
steady state dynamic equilibrium.

ex·cit·ed state

the condition of an atom or molecule after absorbing energy, which may be the result of exposure to light, electricity, elevated temperature, or a chemical reaction; such activation may be a necessary prelude to a chemical reaction or to the emission of light.
Synonym(s): activated state

ex·cit·ed state

(ek-sī'tĕd stāt)
The condition of an atom or molecule after absorbing energy, which may be the result of exposure to light, electricity, elevated temperature, or a chemical reaction; such activation may be a necessary prelude to a chemical reaction or to the emission of light.
References in periodicals archive ?
In the UV-Vis spectral region, the main absorption band was found to be the first excited state (S1 state).
Caption: Figure 6: Charge distribution for off-center donor [[rho].sub.i] = 20 nm) in the ground state (a, b) and in the first excited state (c, d) for [gamma] = 0, 5, 10, 15 in circular QR.
Rai, "Excited state mass spectra of doubly heavy [XI] baryons," The European Physical Journal C, vol.
The characteristics of electron transition are from an excited state to the conduction band of the semiconductor, and it can be achieved from the investigation of electrochemical properties.
The energy of the first ten singlet and triplet excited states were calculated using the time-dependent approach of DFT (TD-DFT), making possible the description of the excitation spectrum of the species as well as the energy diagram of the first non-relaxed states.
Images of the excited state O-atom transition are shown in the top row of Figure 11.
This may be due to the fact that the fluorescence of ThT in the solutions is caused by the transition from a nonequilibrium excited state to the nonequilibrium ground state, and the position of the peak of fluorescence spectrum is not so sensitive to the solvent polarity as the position of the maximum of the absorption spectrum.
The efficient formation of singlet excited state products, necessary for the use of these systems in the many applications referred above, is only made possible by the formation of cyclic peroxide intermediates during the different chemi- and bioluminescent reactions [18-28].
Hydrogen bonding and dipolar interactions between quinacridone molecules are strong and may promote quicker relaxation of reactive excited states along pathways that help preserve the quinacridone's chemical structure (Figure 5).
Thus, in aromatic solvents, the positions of the absorption bands undergo bathochromic shifts when in media of higher polarisability [7], because polarisable solvent molecules apparently stabilise cations in the Frank-Condon excited state. At the same time, the influence of the nucleophilicity of aromatic solvents is abnormally weak owing to the formation of [pi]-complexes between the aromatic molecules and organic cations [19, 20].
Two neutrino double [beta] decay of [sup.100]Mo to the [2.sup.+] excited state of [sup.100]Ru.
The product formed is in an electronically excited state; it returns to its ground state by giving off light.