Neutron induced alpha radiography

A radiography technique which makes use of α-particles as penetrating radiation has been developed. The images were registered in the solid-state nuclear track detector CR-39 and the conditions to obtain the best radiography image were 2.2 h of irradiation and 25 min of etching in a KOH (30%) aqueous solution at 70∘C. For such conditions the resolution in the image was 23μm. Some radiographs are shown and demonstrate the potential of the technique to inspect samples with thickness in the μm range.