INVESTIGATION OF THIN OBJECTS BY ELECTRON RADIOGRAPHY

Electron radiography uses photoelectrons produced by X-rays for registering an image of a specimen on radiographic film. Specimens examined by electron radiography are limited by the range of electrons to thin, light materials. Papers, wood shavings leaves, fabrics and thin sheets of rubber and plastics can be examined by this method. There are two methods for obtaining electron radiographs of thin objects; one based on transmission and the other on emission. The selection of method depends on the investigation being made on the subject. In this work, the structure and production histories of thin objects such as banknotes and stamps have been investigated by electron radiography.