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
Pitchblende (band) Pitchblende (band) Pitchblende was a four-piece art punk band from Washington, D.C., composed of Justin Chearno on guitar, Scott DeSimon on bass guitar, Patrick Gough on drums and Treiops Treyfid on guitar. Between 1991 and 1995, the group recorded three full-length albums and several singles for the independent labels Cargo, Jade Tree, Matador Records and Simple Machines. Although based in Washington, Pitchblende's dense, angular sound was commonly thought to be closer in style to the contemporary music scenes in New York City and Chicago than what was heard on the DC-based post-punk labels at the time. Central to Pitchblende's approach