Publication

Spectroscopy and relaxation paths of higher electronic states of mercury atoms and dimers in rare gas matrixes

Majed Chergui
1992
Journal Articles

Abstract

Absorption, emission and fluorescence-excitation spectra are reported for Hg atoms and Hg2 mols. in Ar, Kr, Xe and N2 matrixes upon excitation by synchrotron radiation in the 260-90 nm range. The fluorescence emitted from all levels issued from the 6s6p configuration (including strongly forbidden 3P0 -> 1S0 and 3P2 -> 1S0 transitions) upon the excitation of autoionized (5d)9(6s)2(np) levels is explained by ionization-recombination processes. Upon excitation of the 1P1 level, the efficiency of the 1P1 -> 3PJ relaxation depends strongly on the host properties. Preliminary conclusions concerning environmental effects on oscillator strengths, relaxation and ionization-recombination processes are discussed. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/c0fa4c1b-bb69-4d72-b63b-a3504bf345a2

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Majed Chergui
1992
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c0fa4c1b-bb69-4d72-b63b-a3504bf345a2

About this result

Related concepts (32)

Absorption spectroscopy

Absorption spectroscopy refers to spectroscopic techniques that measure the absorption of electromagnetic radiation, as a function of frequency or wavelength, due to its interaction with a sample. The sample absorbs energy, i.e., photons, from the radiating field. The intensity of the absorption varies as a function of frequency, and this variation is the absorption spectrum. Absorption spectroscopy is performed across the electromagnetic spectrum.

Fluorescence spectroscopy

Fluorescence spectroscopy (also known as fluorimetry or spectrofluorometry) is a type of electromagnetic spectroscopy that analyzes fluorescence from a sample. It involves using a beam of light, usually ultraviolet light, that excites the electrons in molecules of certain compounds and causes them to emit light; typically, but not necessarily, visible light. A complementary technique is absorption spectroscopy. In the special case of single molecule fluorescence spectroscopy, intensity fluctuations from the emitted light are measured from either single fluorophores, or pairs of fluorophores.

Fluorescence

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the emitted light has a longer wavelength, and therefore a lower photon energy, than the absorbed radiation. A perceptible example of fluorescence occurs when the absorbed radiation is in the ultraviolet region of the electromagnetic spectrum (invisible to the human eye), while the emitted light is in the visible region; this gives the fluorescent substance a distinct color that can only be seen when the substance has been exposed to UV light.

Related publications (29)

Spectroscopy and relaxation paths of higher electronic states of mercury atoms and dimers in rare gas matrixes

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