Decay chain equilibrium is achieved, each successive daughter isotope is present in direct proportion to its half-life; but since its activity is inversely proportional to its half-life, each nuclide in the decay chain finally contributes as many individual transformations as the head of the chain, though not the same energy. For example, uranium-238 is weakly radioactive, but pitchblende, a uranium ore, is 13 times more radioactive than the pure uranium metal because of the radium and other daughter isotopes it contains. Not only are unstable radium isotopes significant radioactivity emitters, but as the next stage in the decay chain they also generate
Uranium – Twisting the Dragon's Tail Uranium – Twisting the Dragon's Tail Uranium – Twisting the Dragon's Tail is a television documentary series about uranium, its history, and its uses. It was produced by Gene Pool Productions for PBS and SBS and premiered on both networks in late July and August 2015. The series was conceived, created, written and directed by Wain Fimeri, was shot in nine countries and is presented by Derek Muller. Derek Muller introduces uranium and its use throughout history. Uranium, originally sourced from pitchblende, became the subject of intense scientific study. Using computer-generated dragons as a metaphor for daughter isotopes, the episode