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Silveira, E.F. da; Schweikert, E.A.
Proceedings of the 2. Latin American Meeting on Atomic, Molecular and Electronic Collisions1988
Proceedings of the 2. Latin American Meeting on Atomic, Molecular and Electronic Collisions1988
AbstractAbstract
[en] Surface analysis, through desorption, induced by fast particles, is presented and discussed. The stopping of projectils is essentially made by collisions with the target electrons. The desorbed particles are generally emmited with kinetic energy from 0.1 to 20 eV. Mass, charge, velocity and emission angle give information about the surface components, its structure as well as beam-solid interaction processes. Time-of-flight mass spectroscopy of desorbed ions, determine the mass of organic macromolecules and biomolecules. (A.C.A.S.)
[pt]
A analise de superficies atraves de desorcao induzida por feixes de particulas rapidas e apresentada e discutida. O freiamento dos projeteis e essencialmente feito por colisao com eletrons do alvo, e as particulas desorvidas sao em geral emitidas com energia cinetica na faixa de 0,1 - 20 eV. Suas distribuicoes de massa, carga velocidade e angulo de emissao informam sobre os constituintes da superficie e sua estrutura assim como sobre os processos de interacao projetil-solido. A espectroscopia de massa por tempo de voo dos ions desorvidos determina a massa das macromoleculas organicas e de biomoleculas. (A.C.A.S.)Original Title
Desorcao de ions induzida por feixe de particulas carregadas: mecanismos e espectroscopia de massa
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Montenegro, E.C.; Pinho, A.G. de; Souza, G.G.B. de.; Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil). Dept. de Fisica; Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil). Dept. de Quimica; 167 p; 1988; p. 94-102; 2. Latin American Meeting on Atomic, Molecular and Electronic Collisions; Caxambu, MG (Brazil); 25-30 Sep 1988
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