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AbstractAbstract
[en] The enrichment of 235U in UO2 pellets samples through the instrumental neutron activation analysis method (I.N.A.A.) was determined. By high resolution gamma-ray spectrometry (H.R.G.S.), from analysis of isotopic ratios between fission products peaks from 235U and 239Np different energies peaks from 238U, the enrichment was achieved. The 'Boatstrap' statistics technique for the analytical results, which is based in shaping results of an unknown distribution to the Gaussian distribution by B replications in interested statistics such as: the mean and its standard error, was introduced. (M.J.C.)
[pt]
Determina-se o enriquecimento em 235U em amostras de pastilhas sinterizadas de UO2 atraves do metodo da analise por ativacao neutronica instrumental (A.A.N.I.). Obtem-se o enriquecimento atraves das razoes entre os picos relativos aos produtos de fissao do 235U com os picos de diferentes energias pertencentes ao 239Np, oriundo do 238U, utilizando a espectrometria gama de alta resolucao (E.G.A.R.). Introduz-se uma tecnica estatistica na analise dos resultados obtidos, chamada 'Bootstrap' que se baseia na modelagem de dados de uma distribuicao desconhecida em uma Gaussiana atraves de B repeticoes, procedendo-se assim as estatisticas de interesse, neste caso: media e erro padrao. (M.J.C.)Original Title
Determinacao do enriquecimento em U-235 do combustivel nuclear por ativacao neutronica
Primary Subject
Source
1988; 96 p; Tese (M.Sc.).
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Report Number
Country of publication
ACTINIDE NUCLEI, ACTIVATION ANALYSIS, ALPHA DECAY RADIOISOTOPES, CHEMICAL ANALYSIS, EVEN-ODD NUCLEI, HEAVY NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MINUTES LIVING RADIOISOTOPES, NONDESTRUCTIVE ANALYSIS, NUCLEI, RADIOISOTOPES, SEPARATION PROCESSES, SPECTRA, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
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