electron impact desorption
31Spectrometrie de masse — Spectrométrie de masse Pour les articles homonymes, voir MS. La spectrométrie de masse (mass spectrometry ou MS) est une technique physique d analyse permettant de détecter et d identifier des molécules d’intérêt par mesure de leur masse, et de… …
32Spectromètre de masse — Spectrométrie de masse Pour les articles homonymes, voir MS. La spectrométrie de masse (mass spectrometry ou MS) est une technique physique d analyse permettant de détecter et d identifier des molécules d’intérêt par mesure de leur masse, et de… …
33Extreme ultraviolet — Extreme Ultra Violet radiation (EUV) is generally considered to be the part of the electromagnetic spectrum spanning from 120 nm down to 10 nm. Its main uses are photoelectron spectroscopy, solar imaging, and lithography. EUV is naturally… …
34Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal …
35Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
36Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions …
37catalysis — catalytic /kat l it ik/, adj., n. catalytical, adj. catalytically, adv. /keuh tal euh sis/, n., pl. catalyses / seez /. 1. Chem. the causing or accelerating of a chemical change by the addition of a catalyst. 2. an action between two or more… …
38Medard W. Welch Award — The award is given to scientists who demonstrated outstanding research in the fields pertinent to American Vacuum Society. It was established in 1969 in memory of Memory of Medard W. Welch, a founder of American Vacuum Society. The prestige of… …
39SPECTROMÉTRIE DE MASSE — Le spectromètre de masse est un appareil qui, sous vide élevé, fait correspondre à chacune des masses des éléments d’un corps (atomes, molécules, fraction ou association de molécules, radicaux, etc.), après ionisation, une indication chiffrée… …
40Nanoparticle — In nanotechnology, a particle is defined as a small object that behaves as a whole unit in terms of its transport and properties. Particles are further classified according to size[1] : in terms of diameter, coarse particles cover a range… …
