Ions Stopping Power
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Estudo sistemático do freamento de íons pesados em sólidos no regime de baixas velocidades / Systematic study of heavy ions stopping in solids at the low velocity regime
The energy loss of ions in materials is an important issue not only because of its direct applications on material analysis techniques, but also for the understanding of the interactions. Accurate knowledge of heavy ion stopping power at low energies is necessary in materials science as well as in basic physics, e. g. in the Doppler Shift Attenuation Method
Publicado em: 2009
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2. Medida de uma curva contínua do poder de freamento de partículas alfa em Al na região do pico de Bragg / Mensure of the stopping power continuous curve for alpha particles in Al foils around the Bragg peak energy
We present in this work experimental energy loss curves for alpha particles in Al foils around the Bragg peak energy. Our method is based on an integration of the energy spectrum, combining elastic scattering in thick targets with transmission method, providing an almost continuous energy loss curve with $2-3\%$ precision. To achieve this precision we perfor
Publicado em: 2008
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3. Mesure of a continuos curve of stopping power for alpha particles in Al around region of Broogs peak / Aplicação do GEANT4 no estudo da influência da rugosidade da superfície de ânodos de tubos de raios X utilizados em radiologia diagnóstica
Estudos recentes utilizaram filtração com absorvedores de W para representar o efeito da rugosidade do ânodo. Para verificar a validade desta metodologia, neste trabalho, foram avaliados espectros de energia na faixa utilizada em radiologia diagnóstica convencional (40, 80 e 150 kV), gerados por tubos de raios X com ânodos rugosos por meio de simulaçõ
Publicado em: 2008
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4. Estudo da formação de rastos nucleares em polímeros / Study of the Nuclear Tracks Formation in Polymers
The research in the field of material modification with ion implantation has greately improved, stimulated by technological applications in biology, medicine, electronics and other related areas. One of the correlated aspects in understanding these new materials is the identification and characterization of the damage produced by ion beam irradiation. In thi
Publicado em: 2007
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5. Study of stopping of natural Cu ions in Au at low velocities / Estudo do freamento de íons de Cu natural em Au em baixas velocidades
The energy loss of ions in materials is an important issue not only because of its direct applications in analytic techniques of materials but also for studying the basics of ion-atom interactions. Nevertheless, the Stopping Power of heavy ions in solids is still poorly understood which is especially true at low velocities mainly due to the complicated depen
Publicado em: 2005