| - Contains tabulated information on radioactive decay types and energies | This symbol is included in ISO 21482:2007 |
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| Radio-activity by Ernest Rutherford Phd, Encyclopedia Brit |
U-238's decay chain to uranium-234 and eventually lead-206 involves emission of eight alpha particles in a time hundreds of thousands of years short compared to the halflife of U-238, so that a sample of U-238 in equilibrium with its decay products as in natural uranium ore will have eight times the alpha activity of U-238 alone.
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