O setor leptônico neutro e a violação de CP

Pós-graduação em Física - IFT

Mistura de sabor e violação de CP

Pós-graduação em Física - IFT

Simetria discreta 'S IND. 3' como uma possível extensão para o Modelo Padrão

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Despertando responsabilidade social no ensino médio por meio de temáticas associadas à física nuclear

Many discussions about the role of the school are on the agenda, in an increasingly complex society. Sociologists, educators, anthropologists, researchers of different areas seek that role. The objective of this dissertation is to contribute what we can consider the central role for the physics teaching, citizenship training. We have elaborated a didactic proposal to increase the interest of high school students on issues of social relevance and, throughout it, to promote the formation of attitudes of social responsibility, enhancing the formation of a more politically and socially active citizen. For the preparation of the proposal, studies were made on education for citizenship and on attitudes change, using as its main theoretical foundation the researches on the Science, Technology and Society curricular emphasis. The teaching of Nuclear Physics was integrated to our proposal, due to its pedagogical potential for the discussion of social, political and economic subjects related to scientific concepts and associated technologies. The educational proposal we have produced was applied on a high school class of a private school at Natal-RN. It was composed from the controversial issue involving the installation of nuclear power plants in Brazilian northeast. The methodology of role playing, in which students assumed social roles and produced specific subsidies for a public hearing and a later referendum, both simulated. In the analysis of the implementation of the proposal, we highlighted the difficulties but also the possibilities and the relevance of exercising skills such as reasoning, finding information, and arguing about of social problems. The results of the research showed the possibility of meaningful learning on Nuclear Physics contents, through this social, political, economic, scientific and technological contextualization using a controversial and real issue together with mechanisms that trigger for greater popular participation, as public hearing. It has also been identified changes in attitude by some students about issues related to Nuclear Physics. We hope, through this dissertation, to contribute to the formation of future citizens as well as to the initiative of teachers-researchers with pedagogical aims similar to those in the present work

Creación de experiencias virtuales en física nuclear

El estudio de la radiactividad y su influencia en los seres vivos es un tema fundamental para la formación de los alumnos de los grados en Biología y Ciencias del Mar, y por lo tanto aparece incluido en el plan de estudios de la asignatura de Física de las dos carreras anteriormente mencionadas. A pesar de esto, dicha signatura no cuenta con ninguna práctica de laboratorio en el tema de radiactividad. Esto es debido, principalmente, al alto coste de los equipos y a cuestiones de seguridad. Con el objetivo de solventar este problema en la formación de los alumnos de Física hemos programado, usando el lenguaje JAVA, dos prácticas de laboratorio virtuales en el área de radiactividad. En una de las experiencias, el alumno mide la evolución de la actividad de una muestra radiactiva con el tiempo y a partir de esto podrá obtener la vida media del isótopo radiactivo estudiado, calcular la cantidad de isótopo que queda en la muestra al transcurrir un cierto tiempo, o evaluar el tiempo necesario que debe de transcurrir para que quede un cierto porcentaje del material radiactivo inicial. En la otra experiencia la medición de la actividad y la masa de una muestra dada de carbono de origen biológico, permitirá establecer la edad de la muestra usando el método del 14C. En ambas prácticas el alumno utiliza el instrumental virtual tal y como si estuviera en un laboratorio real con el instrumental adecuado. La interactividad de la práctica y la posibilidad de realizarla fuera de la universidad, a través de internet, hacen de los experimentos virtuales diseñados un excelente complemento a las prácticas tradicionales de laboratorio.

Busca de nova física em fábricas de neutrinos, no CERN-LEP e na nova geração de aceleradores lineares

Pós-graduação em Física - IFT

Percursos da física e da energia nucleares na capital portuguesa : ciência, poder e política, 1947-1973

Tese de doutoramento, História e Filosofia das Ciências, Universidade de Lisboa, Faculdade de Ciências, 2014

Sum rules and short-range correlations in nuclear matter at finite temperature

The nucleon spectral function in nuclear matter fulfills an energy weighted sum rule. Comparing two different realistic potentials, these sum rules are studied for Greens functions that are derived self-consistently within the T matrix approximation at finite temperature.

Nuclear pairing: surface or bulk?

We analyze how the spatial localization properties of pairing correlations are changing in a major neutron shell of heavy nuclei. It is shown that the radial distribution of the pairing density depends strongly on whether the chemical potential is close to a low or a high angular momentum level and has little sensitivity to whether the pairing force acts at the surface or in the bulk. The pairing density averaged over one major shell is, however, rather flat, exhibiting little dependence on the pairing force. Hartree-Fock-Bogoliubov calculations for the isotopic chain 100-132Sn are presented for demonstration purposes.

Sum rules and correlations in asymmetric nuclear matter

The neutron and proton single-particle spectral functions in asymmetric nuclear matter fulfill energy-weighted sum rules. The validity of these sum rules within the self-consistent Green's function approach is investigated. The various contributions to these sum rules and their convergence as a function of energy provide information about correlations induced by the realistic interaction between the nucleons. The study of the sum rules in asymmetric nuclear matter exhibits the isospin dependence of the nucleon-nucleon correlations.

La física del siglo XX.

Obtuvo la cuarta mención de la modalidad B en el XII Certamen de Materiales Curriculares de 2004, organizado por la Consejería de Educación de la Comunidad de Madrid

Estado actual de la Física y Química desde el punto de vista científico.

Se realiza un estudio sobre el panorama de la Física desde el punto de vista de los campos convencionales de la misma: Mecánica, Termodinámica, Óptica y Electricidad. Los temas que se tratan son: el láser, la física nuclear y partículas fundamentales, los quarks, la física del estado sólido, las fuentes de energía del futuro, física y química del plasma, química inorgánica moderna, métodos instrumentales de análisis, y la química orgánica. Por último, se hace referencia al futuro del cosmos.