Abstract
The track etching method has been employed for neutron radiography purposes, by making use of a cold neutron beam obtained at the IEA-RI nuclear research reactor. The films used were the solid state nuclear track detectors CN-85, CR-39, Makrofol-E and LR-115, with a natural boron converter screen. In order to obtain a mean track diameter of about 3 μm with a minimum overlap between them, adequate conditions for etching and exposure times of about 30 min and 3 h, respectively, were evaluated. For such conditions, exposures of 10 9 n/cm 2, which correspond to 10 7 track/cm 2, were achieved. Neutron radiographs of several materials were performed and the best results in terms of optical contrast were obtained for the films CN-85 and CR-39.
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Schedule a callMore From: International Journal of Radiation Applications & Instrumentation. Part A, Applied Radiation & Isotopes
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