11. Radon is entirely radiogenic , since it has too short a half-life to occur primordially. 12. As noted in the case of lead-204, a radiogenic nuclide is often not radioactive. 13. Jupiter's moon, subsurface water oceans where radiogenic and tidal heating enables liquid water to exist. 14. 53 Cr is the radiogenic decay product of 53 nucleosynthetic processes immediately before coalescence of the solar system. 15. The U / Pb ratio was so low that no radiogenic decay was detected in the isotopic composition. 16. It was found that 232 Th and 282 U together generate 20.0 TW of radiogenic power. 17. Helium-4 is created by radiogenic production ( by decay of uranium / thorium-series elements ). 18. This, in turn, influences the 143 Nd / 144 Nd ratios with ingrowth of radiogenic 143 Nd. 19. The evolution of Earth's mantle radiogenic heat flow over time : contribution from 40 K in yellow. 20. It also suggests that this temperature means that the concentration of radiogenic isotopes is greater than within the earth.
