Modelagem de processos nucleares de alta energia em explosões solares utilizando o pacote FLUKA
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Tipo
Tese
Data de publicação
2018-08-16
Periódico
Citações (Scopus)
Autores
Tusnski, Daneele Saraçol
Orientador
Szpigel, Sérgio
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Valio, Adriana Benetti Marques
Castro, Carlos Guillermo Giménez de
Costa, Joaquim Eduardo Rezende
Simões, Paulo José de Aguiar
Castro, Carlos Guillermo Giménez de
Costa, Joaquim Eduardo Rezende
Simões, Paulo José de Aguiar
Programa
Ciências e Aplicações Geoespaciais
Resumo
The emission of 𝛾-rays in solar flares is produced by interactions of primary electrons and
ions accelerated to high energies with nuclei in the ambient solar atmosphere. The analysis
of the 𝛾-ray spectra observed during solar flares provides important diagnostics on the
mechanisms of primary particle acceleration and on the structure and evolution of the
ambient plasma. In this work we investigate the high energy nuclear processes that occur in
solar flares using FLUKA, a package of general purpose integrated routines for Monte Carlo
calculations of particle transport and interactions in matter. Our main aim is to validate
FLUKA as an effective tool for the modeling of nuclear processes in the context of solar
flares. In order to accomplish that, we have performed simulations of the 𝛾-ray spectrum
considering realistic models for the ambient solar atmosphere and beams of accelerated ions
(protons, 𝛼-particles and heavier nuclei) with different energy and angular distributions.
From the results obtained in the simulations with FLUKA, we have built templates for
the nuclear de-excitation lines emission spectrum and for the full 𝛾-ray emission spectrum,
which were incorporated to the program OSPEX for the fitting of spectra from observed
events. Using these templates in combination with standard-functions avaiable in the
programa OSPEX we have obtained statistically reasonable fittings for the 𝛾-ray spectra
of the July 23, 2002 and June 12, 2010 solar flares, similar to the fittings obtained with
templates built from nuclear de-excitation lines emission spectra calculated with the code
developed by Murphy et al. (2009). To the best of our knowledge, the fittings carried out
with the FLUKA templates for the full 𝛾-ray emission spectrum can be regarded as the
first attempt to use a single code to implement a self-consistent treatment of the several
spectral components in the energy range from ∼ 100’s keV to ∼ 100’s MeV.
Descrição
Palavras-chave
explosões solares , processos nucleares de alta energia , FLUKA
Assuntos Scopus
Citação
TUSNSKI, Daneele Saraçol. Modelagem de processos nucleares de alta energia em explosões solares utilizando o pacote FLUKA. 2018. 108 f. Tese( Ciências e Aplicações Geoespaciais) - Universidade Presbiteriana Mackenzie, São Paulo.