RESUMO
In this paper results of X-ray and gamma-ray emission probabilities per decay of (51)Cr and (241)Am are presented. The measurements were carried out by means of HPGe planar and REGe spectrometers. The activity of (51)Cr and (241)Am samples was determined in a 4pibeta-gamma coincidence counting system. The HPGe spectrometers were calibrated in a well defined geometry by means of (54)Mn, (55)Fe, (57)Co, (133)Ba, (152)Eu, (166m)Ho and (241)Am sources, previously standardized in a 4pibeta-gamma coincidence system. The MCNP Monte Carlo code was used for simulation of the REGe spectrometer calibration curve, for the selected geometry, and compared with the experimental curve. The experimental results were compared with data from literature.
Assuntos
Amerício/análise , Radioisótopos de Cromo/análise , Radiometria/métodos , Espectrometria gama/métodos , Amerício/química , Radioisótopos de Cromo/química , Interpretação Estatística de Dados , Raios gama , Meia-Vida , Doses de Radiação , Raios XRESUMO
In order to improve the identification and quantity determination of chromium in biological material the conditions for obtaining chromium chelate were studied. The method used for this purpose was gas chromatography standardized by isotopic dilution (Cr-51) technique. The results showed the adequacy of the method concerning sensitivity and standardization.