Diabatic - Wikipedia
WEBDiabatic. One of the guiding principles in modern chemical dynamics and spectroscopy is that the motion of the nuclei in a molecule is slow compared to that of its electrons. This is justified by the large disparity between the mass of an electron, and the typical mass of a nucleus and leads to the Born–Oppenheimer approximation and the idea ...
Adiabatic process - Wikipedia
WEBAn adiabatic process (Greek: adiábatos, "impassable") is a type of thermodynamic process that occurs without transferring heat or mass between the thermodynamic system and its environment. Unlike an isothermal process, an adiabatic process transfers energy to the surroundings only as work.
Adiabatic theorem - Wikipedia
WEBThe adiabatic theorem is a concept in quantum mechanics. Its original form, due to Max Born and Vladimir Fock (1928), was stated as follows: A physical system remains in its instantaneous eigenstate if a given perturbation is acting on it slowly enough and if there is a gap between the eigenvalue and the rest of the Hamiltonian 's spectrum. [1]
Diabatic Definition & Meaning - Merriam-Webster
WEBThe meaning of DIABATIC is involving the transfer of heat —opposed to adiabatic. How to use diabatic in a sentence.
6.3: Diabatic and Adiabatic States - Chemistry LibreTexts
WEBDiabatic states can be defined in an endless number of ways, but only one adiabatic surface exists. In that respect, the term “nonadiabatic” is also used to refer to all possible diabatic surfaces. However, diabatic states are generally chosen so that the nonadiabatic electronic couplings in Equation 6.2.14 and 6.2.15 are zero.
DIABATIC Definition & Meaning | Dictionary.com
WEBDiabatic definition: occurring with an exchange of heat (opposed to adiabatic). See examples of DIABATIC used in a sentence.
Diabatic Process - an overview | ScienceDirect Topics
WEBThere are five categories of diabatic processes: solar and terrestrial radiation, latent and sensible surface heat flux, and friction. Figure 6 illustrates how diabatic heating is distributed on the seasonal and zonal means.
Diabatic - Definition, Meaning & Synonyms | Vocabulary.com
WEBFeb 23, 2024 · Definitions of diabatic. adjective. involving a transfer of heat. “a diabatic process”. see more.
What are the similarities and differences of adiabatic and diabatic …
WEBMay 21, 2018 · Therefore, adiabatic and diabatic PESs differ by the basis they are written in. They can both be used to describe the same process, but there is no real need to use the diabatic representation when the BO approximations holds. They can be referred to as adiabatic/diabatic PESs, or states, or surfaces, or representations.
physical chemistry - Definition of "Diabatic" vs "Diathermic ...
WEBAug 21, 2016 · 1. In thermodynamics we use adiabatic to mean impassible to heat, i.e. a process in which no heat enters or leaves. Diathermy means 'heating through' and does not seem to be that commonly used. We could use non-adiabatic and diabatic instead but its unusual in thermodynamics.
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