thermal excitation

thermal excitation

[′thər·məl ‚ek·sī′tā·shən]
(atomic physics)
The process in which atoms or molecules acquire internal energy in collisions with other particles.
References in periodicals archive ?
Therefore, the grains in the vicinity of the layers release the thermal excitation faster than the regions of monolithic alumina.
The reverse saturation current is due to the minority carriers at the depletion layer edge and at the i region by thermal excitation. During the calculation, we used the measured [J.sub.SC] value with [J.sub.0] as a fitting parameter.
If we consider that the specimen is an isotropic and homogenous medium, the thermal excitation is very similar to an impulse function, no heat is generating inside the slab, and there is no loses by convection through its surfaces, Eq.
The results show that a significant increase in the p concentration of carriers is observed at temperatures greater than 250[degrees]K, apparently caused by thermal excitation of electrons from extended states at the valence band toward accepting states within the gap, thus generating an increase in the density of negatively ionized accepting impurities (Figure 2).
Due to these cross effects the thermal excitation results in an additional mass concentration and the mass concentration generates the additional field of temperature.
Heat is transferred from hot regions to cold regions due to thermal excitation of atoms and free movement of electrons in metals following Fourier's Law:
In the team's first test of thermal excitation, they reported that a photonic crystal of crisscross silicon rods, heated to 137[degrees]C, emitted strongly at wavelengths shorter than 10 micrometers ([micro]m) but showed much less emission at longer wavelengths.
Only after thermal excitation do they become incorporated into the crystal structure."
In such approach, the appearance of a collection of resonators--with all sort of frequencies --depends only on thermal excitations, that is, for T = 0 they do not exist.
2 Thermal excitations of vacuum induced fluctuations
For T [not equal to] 0, there are thermal excitations, which manifest as additional vibrations that increase the amplitude of existing fluctuations.
But it has been a great challenge to modify surface conduction, because of dominant bulk contribution due to impurities and thermal excitations in such small-band-gap semiconductors.

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