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Doctoral Thesis
DOI
10.11606/T.43.2003.tde-24022014-113716
Document
Author
Full name
Carlos Takiya
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2003
Supervisor
Committee
Helene, Otaviano Augusto Marcondes (President)
Dias, Mauro da Silva
Gonçalez, Odair Lelis
Martins, Marcos Nogueira
Ramos, Fernando Manuel
Title in Portuguese
Problemas inversos em física experimental: a secção de choque fotonuclear e radiação de aniquilação elétron-pósitron
Keywords in Portuguese
Análise de dados
Reações fotonucleares
Abstract in Portuguese
Os métodos para resolução de Problemas Inversos aplicados a dados experimentais (Regularização, Bayesianos e Máxima Entropia) foram revistos. O procedimento de Mínimos Quadrados com Regularização por Mínima Variância (MQ-RMV) foi desenvolvido para resolução de Problemas Inversos lineares, tendo sido aplicado em: a) espectros unidimensionais simulados; b)determinação da secção de choque ANTPOT.34 S (, xn) a partir de yield de bremsstrahlung; c)análise da radiação de aniquilação elétron-pósitron em alumínio de experimento de coincidência com dois detetores semicondutores. Os resultados são comparados aos obtidos por outros métodos.
Title in English
Inverse problems in experimental physics: a section of the fotonuclear shock and radiation of electron-positron annihilation.
Keywords in English
Data analysis
Fotonuclear reactions
Abstract in English
The methods used to solve inverse problems applied to experimental data (Regularization, Bayesian and Maximum Entropy) were revised. The Least-Squares procedure with Minimum Variance Regularization (LS-MVR) was developed to solve linear inverse problems, being applied to: a)simulated one-dimensional histograms; b) 34S (, xn) cross-section determination radiation in Aluminum from coincidence experiments with two semiconductor detectors. The results were compared to that obtained by other methods.
 
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RE40548Takiya.pdf (4.96 Mbytes)
Publishing Date
2014-02-24
 
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