The Uranium 238 Decay Chain


Here is the decay chain involved in the production of Uranium point-source pleochroic halos. The "polonium" halo is claimed by 'Dr.' Gentry to lack all of the first seven steps in the chain (up to and including 222Rn). My (John Brawley's) hypothesis claims that the "polonium" halo lacks all of the first six steps in the chain (up to but not including 222Rn; in my work, Radon222 gas atoms are the source of "polonium" halos. Once again, the alpha decays are in bold text:

Read the table this way: "This atomic weighted element decays with this Likelihood and this Energy (in millions of electron-Volts), via this decay type, taking this amount of time to do so, becoming (the element in the next line in the table)". Things are not actually that simple, of course; some of these decays also produce mostly miniscule amounts of other elements, by "side chains" of nuclear decays. For example, there are odd, unlikely, but known side chains in the 214Bi-->214Po step, and in the 210Bi-->210Po step, both involving either beta or alpha decays, but these are unlikely to be seen in pleochroic halos. In general, this table presents the salient data accurately.

Source: CRC Handbook of Chemistry and Physics; 61st Edition
At.Wgt./Element Likelihood Energy (MeV) Decay type Time involved
238Uranium 99% 4.20 alpha 4.5 gigayears
234Thorium 77%   beta 24 days
234Protactinium     beta 6.7 hours
234Uranium 72% 4.77 alpha 247,000 years
230Thorium 76% 4.68 alpha 80,000 years
226Radium 95% 4.78 alpha 1600 years
222Radon 100% 5.49 alpha 3.83 days
218Polonium 99.9% 6.00 alpha 3 minutes
214Lead(Pb)     beta 20 minutes
214Bismuth     beta 27 minutes
214Polonium 99% 7.69 alpha 16 microseconds
210Lead     beta 21 years
210Bismuth     beta 5 days
210Polonium 100% 5.30 alpha 138 days
206Lead No decay None(stable) None(st) (forever)