ID # | Nuclide | Half-life (yr) | Decay Mode | Variation | Technique | Mag of Modul | Peak Day | Author | Organization |
1 | 226Ra | 1600 | alpha decay | Annual | ABSOLUTE | ~1.5E−3 | 30 | Siegert [1] | PTB |
2 | 154Eu | 8.59 | beta minus decay | Annual | ABSOLUTE | ~1.5E−3 | 30 | Siegert [1] | PTB |
1-2 | NO | RATIO 1:2 | 0 | NA | Siegert [1] | PTB | |||
3 | 238Pu | 78.74 | alpha decay | Annual | ABSOLUTE | ~2E−3 | −15 | Ellis [2] | Baylor College |
4 | 3H | 12.3 | beta minus decay | Annual | ABSOLUTE | 3.7E−3 | 45 | Falkenberg [3] | Unknown |
5 | 32Si | 170 | beta minus decay | Alburger [4] | Brookhaven | ||||
6 | 36Cl | 3.01E+05 | beta minus decay | Annual | RATIO 5:6 | 0.7E−3 | 40 | Alburger [4] | Brookhaven |
7 | 54Mn | 312d | beta capture | Annual | ABSOLUTE | ~1E−3 | NA | Jenkins [5] | Purdue |
8 | 60Co | 5.27 | beta minus decay | Annual | ABSOLUTE | ~1.5E−3 | ~90 | Parkhomov [6] | Moscow State |
9 | 90Sr | 28.9 | beta minus decay | Annual | ABSOLUTE | ~1.5E−3 | ~60 | Parkhomov [6] | Moscow State |