MODELAGEM DE ESPECTROS DE LINHAS DE DESEXCITAÇÃO NUCLEAR EM EXPLOSÕES SOLARES UTILIZANDO O PACOTE MONTE CARLO FLUKA

Raphael Malagoli Thereza; S´érgio Szpigel; Carlos Guillermo Giménez de Castro; Alexander L. MacKinnon; Paulo José A. Simões

Autores

Raphael Malagoli Thereza Centro de Radio Astronomia e Astrofísica Mackenzie - Universidade Presbiteriana Mackenzie
S´érgio Szpigel
Carlos Guillermo Giménez de Castro
Alexander L. MacKinnon
Paulo José A. Simões

Palavras-chave:

Explosão Solar, Linhas de Desexcitação Nuclear, FLUKA

Resumo

A modelagem de espectros de emissão de raios-y observados em explosões solares é geralmente realizada via melhor ajuste de dados utilizando-se um conjunto de templates e funções independentes para as componentes espectrais produzidas pelos vários processos relevantes (bremsstrahlung de elétrons e pósitrons, desexcitação nuclear, captura de nêutrons, aniquilação de pósitrons e decaimento de píons). Trabalhos recentes têm demonstrado o potencial do pacote Monte Carlo FLUKA como ferramenta efetiva para a simulação de processos nucleares no contexto de explosões solares, bem como sua capacidade de implementar um tratamento auto-consistente de todas as componentes típicas de espectros de emissão de raios-y observados. Neste trabalho, implementamos uma nova estratégia de simulação com o FLUKA que permite melhorar a estatística e a resolução em energia dos espectros de emissão de raios-y gerados. Utilizando essa estratégia, calculamos espectros de linhas de desexcitação nuclear que apresentam boa concordância com os calculados com o código desenvolvido por Murphy et al. (2009) considerando os mesmos parâmetros de modelo. A partir desses espectros, construímos templates que podem ser incorporados ao programa Objective Spectral Executive (OSPEX) e utilizados na análise de dados de emissão de raios-y de eventos observados com instrumentos tais como o Gamma-ray Burst Monitor (GBM) e o Large Area Telescope (LAT), ambos a bordo do satélite FERMI, e o Reuven Ramaty High Energy Spectroscopic Imager (RHESSI).

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