11. Both are a part of the natural uranium decay chain . 12. They give off a total of about 24 MeV from their respective decay chains . 13. Bismuth-213 is also found on the decay chain of uranium-233. 14. These series represent the decay chain products of long-lived primordial U-238, U-235, and Th-232, respectively. 15. Radon is formed as part of the normal radioactive decay chain of uranium and thorium. 16. The sum of these two terms gives the law for a decay chain for two nuclides: 17. These names were used at the time when the decay chains were first discovered and investigated. 18. It couldn't find any of the decay chains Ninov claimed were in the original raw data. 19. The previous equation cannot be applied to the decay chain , but can be generalized as follows. 20. In many cases members of the decay chain are far more radioactive than the original nuclide.
