GamXRAY is a shielding material developed for gamma radiation protection. Its performance is closer to that of pure lead than any of the popular materials in current use. It is non-toxic, non-lead, nano-type material. GamXRAY is discussed, and its properties compared to three materials currently popular for gamma radiation shielding, in the document:GamXRAY Two excellent general discussions of Dirty Bombs are: 1 - Security of Radioactive Sources 2 - Commercial Radioactive Sources, Surveying the Security Risks (Right click on these links in order to open in a separate tab or window)