In this lesson, students will investigate the nature of radioactivity and the effect of both distance and shielding materials on different radioactive sources using a Geiger-Muller tube with a counter ...

Elements that do not exist in nature—that have been created in a laboratory—are unstable. After hours or days of one element bombarding another with enough energy for both to fuse, the resulting new ...

Europe’s upcoming Mars mission will use a pioneering nuclear-powered device that harnesses the radioactive decay of americium to keep its components warm — a first for spacecraft. The European Space ...