Propriedades microscopicas e macroscopicas de superficie em ligas ferrosas implantadas com nitrogenio

AUTOR(ES)

Carlos Alejandro Figueroa

DATA DE PUBLICAÇÃO

2004

RESUMO

The understanding of cosmic radiation -the production/ acceleration mechanism and the propagation processes -involves the determination of three parameters: the energy of this radiation, its arrival direction and the chemical composition. These three tasks have challenged the experience, the skill and responsibility of several groups of particle physicists over the whole world. This work refers to the primary cosmic ray composition in the scope of the Auger Collaboration. It does not intend to present a definite technique to obtain this parameter. As a matter of fact, to determine the primary composition is something difficult, considering the hadronic model dependence and the impossibi1ity (nowadays) of its description event by event. Among the several parameters used to estimate the composition, we attempted to investigate five of them: Xmax, tl0-50, t50-90, tl0-90, rlocal. They were obtained through Monte Carlo simu1ation with two different codes: CORSIKA and AIRES. The surface array was simulated by the SAMPLE program. The simu1ation results were compared, when possible, to experimental data from the Engineering Array of the Auger Observatory

ASSUNTO(S)

surfaces (technology) diffusion in solids superficies (tecnologia) deuterio plasma nitriding nitruração por plasma deuterium hidrogenio hydrogen superficies (fisica) oxigenio surfaces (physics) oxygen difusão em solidos

Documentos Relacionados

• Estudo da cinetica da homogenização em ligas não ferrosas
• Estudo termodinâmico das fases resultantes da nitretação e nitrocarburação de ligas ferrosas
• Desenvolvimento de processo para obtenção de pastas reofundidas de metais e ligas não-ferrosas
• Propriedades macroscopicas de um plasma magnetizado
• Projeto e construção de equipamento para a produção de compositos particulares de ligas não ferrosas