excited state absorption
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Excited state — Excitation is an elevation in energy level above an arbitrary baseline energy state. In physics there is a specific technical definition for energy level which is often associated with an atom being excited to an excited state.In quantum… … Wikipedia
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 … Medical dictionary
absorption spectrum — Spectrum of wavelengths of electromagnetic radiation (usually visible and UV light) absorbed by substance. Absorption is determined by existence of atoms that can be excited from their ground state to an excited state by absorption of energy… … Dictionary of molecular biology
Absorption spectrum — 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 opposite of an emission spectrum.Every chemical element has … Wikipedia
state — A condition, situation, or status. [L. status, condition, s.] absent s. SYN: dreamy s.. activated s. SYN: excited s.. anxiety tension s. a milder form of an anxiety disorder. See anxiety disorders, under disorder … Medical dictionary
Absorption band — An absorption band is a range of wavelengths (or, equivalently, frequencies) in the electromagnetic spectrum which are able to excite a particular transition in a substance. See absorption spectrum. Since energetic transitions can take place in… … Wikipedia
Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… … Wikipedia
Extended X-Ray Absorption Fine Structure — (EXAFS), or more simply X ray Absorption Spectroscopy (XAS), is an experimental method in physics and chemistry of determining the bonding of solids by analyzing oscillations in x ray absorption versus photon energy that are caused by… … Wikipedia
Yttrium aluminium garnet — YAG redirects here. For the IATA airport code see Fort Frances Municipal Airport. For the YMCA sponsored program see YMCA Youth and Government. Yttrium aluminium garnet General Category synthetic mineral Chemical formula Y3Al … Wikipedia
Infrared spectroscopy — (IR spectroscopy) is the subset of spectroscopy that deals with the infrared region of the electromagnetic spectrum. It covers a range of techniques, the most common being a form of absorption spectroscopy. As with all spectroscopic techniques,… … Wikipedia
Transientes Spektrum — Unter dem Begriff Ultrakurzzeit Spektroskopie fast man spektroskopische Messverfahren zusammen, deren zeitliche Auflösung im Bereich von Femtosekunden liegt. Zumeist wird die zeitliche Veränderung spektraler Eigenschaften verfolgt, z. B. die… … Deutsch Wikipedia
