Características dosimétricas de fuentes isotópicas de neutrones
H.R. Vega-Carrilloa,b,c, E. Manzanares Acuñaa, V.M. Hernández Dávilaa,b, G.A. Mercado Sánchezc, E. Gallego Díazd y A. Lorente Fillold
a Estudios Nucleares; Universidad Autónoma de Zacatecas,Apdo. Postal 336, 98000 Zacatecas, Zac. México e-mail: fermineutron@yahoo.com
b Ing. Eléctrica; Universidad Autónoma de Zacatecas,Apdo. Postal 336, 98000 Zacatecas, Zac. México e-mail: fermineutron@yahoo.com
c Matemáticas; Universidad Autónoma de Zacatecas,Apdo. Postal 336, 98000 Zacatecas, Zac. México e-mail: fermineutron@yahoo.com
]]> d Departamento de Ingeniería Nuclear Universidad Politécnica de Madrid C/José Gutiérrez Abascal 2, E-28006 Madrid, España, e-mail: eduardo.gallego@upm.es
Recibido el 8 de marzo de 2005.
Aceptado el 4 de julio de 2005.
Resumen
Mediante metodos Monte Carlo se han calculado los espectros de los neutrones producidos por 252Cf, 252Cf/D2O, 241AmBe, 239PuBe, 140LaBe, 239Pu18O2 y 226RaBe. Con la información del espectro se calculó la energía promedio de los neutrones de cada fuente. Mediante los coeficientes de fluencia a dosis se determinaron, para cada una de las fuentes estudiadas, los factores de fluencia a dosis. Las dosis calculadas fueron H, H*(10), Hp,slab (10,0°), EAP y EISO. Para los cálculos, las fuentes se modelaron como puntuales y sus características se determinaron en el vacío. Además, para el caso de las fuentes de 239PuBe y 241AmBe, se realizaron cálculos Monte Carlo modelando las fuentes con sus dimensiones, y las propiedades dosimétricas se determinaron en un espacio lleno de aire. Los resultados de esta última fase de cálculos se compararon con los resultados experimentales obtenidos para ambas fuentes.
Descriptores: Fuentes de neutrones; Monte Carlo; dosimetría.
Abstract
]]> Using Monte Carlo methods, the neutron spectra produced by 252Cf, 252Cf/D2O, 241AmBe, 239PuBe, 140LaBe, 239Pu18O2 and 226RaBe were calculated. The mean energy and the dosimetric features for each source were determined. The calculated dose were H, H*(10), Hp,slab (10,0°), EAP y EISO. During calculations the sources were modeled as point-like and the dosimetric features were determined in vacuum. For 239PuBe and 241AmBe neutron sources the Monte Carlo calculations were carried out using the actual dimensions and their dosimetric characteristics were evaluated inside of an air-filled region. These results were compared with experimental data.Keywords: Neutron sources; Monte Carlo; dosimetry.
PACS: 29.25.Dz; 24.10.i.x; 28.20.Gd
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Agradecimientos
Este trabajo fue parcialmente apoyado por el CONACyT bajo el convenio SEP-2004-C01-46893
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