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Revista mexicana de física

Print version ISSN 0035-001X

Rev. mex. fis. vol.57  suppl.1 México Feb. 2011

 

An improvement to nuclear track counting systems using laser light scattering

 

C. Vázquez–Lópeza, B.E. Zendejas–Leala, J.I. Golzarrib, and G. Espinosab

 

a Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional, Ave. IPN2508, Col. San Pedro Zacatenco, México, D.F., 07360, México, Tel.: +5255 5747 3800x 6108; fax: +5255 5061 3386. e–mail: cvlopez@fis.cinvestav.mx

b Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20364, México, D.F., 01000, México.

 

Recibido el 10 de marzo de 2010
Aceptado el 31 de agosto de 2010

 

Abstract

In this work we present a device to measure the angular distribution of the diffuse optical transmittance produced by etched nuclear tracks in a polyallyl diglycol carbonate (PADC) detector. The device makes use of a stepper motor to move an array of four photodetectors around the sample in 1.8–degree steps. The effect of additional scatterers is reflected in the width at half height of the angular distribution curves. The width at half height was found to be a linear function of the nuclear track density in the range from zero to 2.8x 105 cm–2. An Am–Be neutron source was used.

Keywords: Transmittance; angular distribution; PADC (CR–39); nuclear tracks.

 

Resumen

En este trabajo reportamos un dispositivo para medir la distribución angular de la transmisión óptica difusa producida por trazas nucleares reveladas en el detector policarbonato alil diglicol. El dispositivo emplea un motor de pasos para mover un arreglo de cuatro fotodetectores alrededor de la muestra en pasos de 1.8 grados. El efecto de agregar trazas nucleares se refleja en el ancho a la mitad del pico de la distribución angular. Se observo que esta cantidad es una función lineal con la densidad superficial de trazas, en el rango desde cero hasta 2.8x 105 cm–2, usando una fuente de Am–Be.

Descriptores: Transmitancia; distribución angular; PADC; CR–39; trazas nucleares.

 

PACS: 29.25.Dz, 29.40.Wk, 29.40.Gx

 

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Acknowledgments

This work was partially supported by Oak Ridge National Laboratory, managed by UT–Battelle Corp. for the U.S. Department of Energy under contract number DE–AC05–00–OR2–2725, PAPIIT–DGAPA–UNAM grant IN101910, and Instituto de Ciencia y Tecnología del D.F., grant 325/2009.

 

References

1. Alfascan (TM) automatic track reader, by Autoscan Systems. (Pty Ltd P.O. Box 112, Ormond, Victoria. Australia).         [ Links ]

2. D. Desideri, M.R. Bruno, and C. Roselli, Journal of Radioanalytical and Nuclear Chemistry, 261 (2004) 37.         [ Links ]

3. G. Cross and L. Tommasino, Radiat. Effect. 5 (1970) 85.         [ Links ]

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