Algoritmo numérico para la determinación de coeficientes de difusión utilizando espectrometría alfa
Cargando...
Archivos
Fecha
Título de la revista
ISSN de la revista
Título del volumen
Editor
Comisión Nacional de Energía Atómica; Argentina
Resumen
Diversos autores han confeccionado ábacos para la determinación de coeficientes de difusión de radiotrazadores emisores alfa, a partir de sus espectros de energía. Tales ábacos fueron construidos utilizando parámetros adecuados que caracterizan el espectro de cada nucleído, pero la medición de todos estos parámetros en los espectros registrados experimentalmente debe hacerse en forma gráfica. El propósito de este trabajo fue encontrar un algoritmo numérico para evitar la determinación gráfica. Para ello se tomó alguno de los momentos del espectro de energías cuyo valor sirve para caracterizar la curva correspondiente. Asimismo, el método de los momentos permitió construir ábacos independientes del radiotrazador, del poder frenador dE/dx, y de la resolución del detector empleado.
Several authors have reported the construction of abaci derived from the energy spectra of alpha-emitting tracers in order to determine their diffusion coefficients. The abaci were built considering suitable parameters of the spectrum of each nuclide. In every case measures of these parameters in experimental spectra were graphical. The purpose of this work was to find a numerical algorithm to avoid graphical determinations. This led to choosing certain moments of the energy spectrum which can characterize the width of the corresponding curve. It was also possible to build abaci independent of the tracer and the absorbing material, and also of the detector resolution.
Several authors have reported the construction of abaci derived from the energy spectra of alpha-emitting tracers in order to determine their diffusion coefficients. The abaci were built considering suitable parameters of the spectrum of each nuclide. In every case measures of these parameters in experimental spectra were graphical. The purpose of this work was to find a numerical algorithm to avoid graphical determinations. This led to choosing certain moments of the energy spectrum which can characterize the width of the corresponding curve. It was also possible to build abaci independent of the tracer and the absorbing material, and also of the detector resolution.