Radioactivity is also.
A gamma-ray treatment eliminates fungus, larvae, insects or bacteria present within objects thereby protecting them from further deterioration. This technique is used in conserving and restoring works of art as well as in ethnology and archaeology. Under proper conditions, irradiation triggers chemical reactions which allow the development of lighter and more resistant materials, such as insulation, electric cables, heat shrinking sheaths, prostheses, etc. This consists in recording the image of the disturbance of an X or g ray beam caused by an object to be checked. It allows defects, in welds for instance, to be detected without destroying the material.