What is the definition of atabsorption? What is your reference source?

Question

Yes, it's spelled correctly.

"We are interested in the ATabsorption spectra in the vicinity of the atomic transition frequency "

I don't need to definition of absorption spectrum. I need the definition of ATabsorption (or atabsorption). Thanks. :)

The spelling is correct. It's related to Physics (I originally thought it had to do with Chemistry).

Answer 1

this is the closet I could find:Absorption spectrum
From Wikipedia, the free encyclopedia
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A material's absorption spectrum shows the fraction of incident electromagnetic radiation absorbed by the material over a range of frequencies. An absorption spectrum is, in a sense, the inverse of an emission spectrum.

Atoms and molecules may change states when they absorb specific amounts of energy. Atomic states are defined by the arrangement of electrons in atomic orbitals. An electron in some orbital may be excited to a more energetic orbital by absorbing exactly one photon which has energy equal to the energy difference of the two orbitals.

Molecular states are defined by the molecule's modes of vibration and rotation. These vibrational and rotational modes are quantised, similar to the atomic orbitals, and may be excited by absorbing single photons.

Absorption spectrum observed by the Hubble Space TelescopeIn both the atomic and molecular cases, the excited states do not persist: after some random amount of time, the atoms and molecules revert back to their original, lower energy state. In atoms, the excited electron returns to a lower orbital, emitting a photon. In molecules, the vibrational or rotational mode decays, also emitting a photon.

When this decay occurs, the photon produced is not necessarily emitted in the same direction as the original photon. This applies to any situation where gases lie between a light source and an observer: the observer will see gaps in the spectrum of the light corresponding to the wavelengths of the photons which were absorbed. These gaps occur despite the re-emission of photons because the re-emitted photons are equally likely to travel in all directions, and it is statistically unlikely to travel along the original path to the observer. These gaps appear as black lines in an image of the spectrum.

Every chemical element has absorption lines at several particular wavelengths corresponding to the differences between the energy levels of its atomic orbitals. Absorption spectra can therefore be used to identify elements present in a gas or liquid. This method is used in deducing the presence of elements in stars and other gaseous objects which cannot be measured directly.

Answer 2

Never encountered that word.

Do you mean "adsorption" which denotes the binding of molecules or particles to a surface? This is different than the more common word absorption that describes filling holes in a solid.

Answer 3

Absorption may refer to:
Absorption (chemistry), absorption of particles of gas or liquid in liquid or solid material
Absorption (Pharmacokinetics), absorption of drugs in body
Absorption (electromagnetic radiation), absorption of light or other electromagnetic radiation by a material
Absorption (acoustics) , absorption of sound waves by a material
Absorption (digestive), the uptake of substances by the gastrointestinal tract
Absorption air conditioning. See for solar air conditioning.[1]
Absorption law, in mathematics, an identity linking a pair of binary operations
Dielectric absorption, interaction and absorption of energy from an applied electromagnetic field by a dielectric material
Flow (psychology), a state of total mental "absorption"
Absorption (economics), the total demand of an economy for goods and services both from within and without

Noun
absorption

The act or process of absorbing or sucking in anything, or of being absorbed and made to disappear; as, the absorption of bodies in a whirlpool, the absorption of a smaller tribe into a larger.
(chemistry, physics) An imbibing or reception by molecular or chemical action; as, the absorption of light, heat, electricity, etc.
(physiology) In living organisms, the process by which the materials of growth and nutrition are absorbed and conveyed to the tissues and organs.
Entire engrossment or occupation of the mind; as, absorption in some employment

Answer 4

couldn't find one on the net.

Answer 5

There are no records of this word. Please check your spelling.