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Radionuclide | Number of Sources |
Number of Half Lives Followed |
Half Life^{*} |
Statistical Standard Uncertainty |
Other Standard Uncertainty |
Reference^{¤} |
---|---|---|---|---|---|---|

^{152}Eu | 4 | 1.6 - 1.8 | 4947.2 ± 1.1 d | 0.7 | 0.8 | §,6 |

^{154}Eu | 3 | 2.4 | 3145.2 ± 1.1 d | 1.1 | 0.0 | §,6 |

^{155}Eu | 2 | 3.1 - 4.3 | 1739.06 ± 0.45 d | 0.45 | 0.0 | §,6 |

*The stated uncertainties are the sum, in quadrature, of the statistical uncertainty (the "external standard deviation" in the weighted mean) and other uncertainties which include those from the Stevenson equation (NBS Special Publication 626) and from the correction for the

^{¤}The reference for every radionuclide is
§ unless otherwise
noted.