272 AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3 11 DECEMBER 2001 Symbol of Radionuclide Element and Atomic Number A₁(TBq) (Special form) ^A1^(Ci) (Special form) A₂(TBq) (Other form) ^A2^(Ci) (Other form) Specific activity (TBq/g) Specific activity (Ci/g) Ir-193m 10 270 10 270 2.4 x 10³ 6.4 x 10⁴ Ir-194 0.2 5.41 0.2 5.41 3.1 x 10⁴ 8.4 x 10⁵ K-40 Potassium (19) 0.6 16.2 0.6 16.2 2.4 x 10^-7 6.4 x 10^-6 K-42 0.2 5.41 0.2 5.41 2.2 x 10⁵ 6.0 x 10⁶ K-43 1.0 27.0 0.5 13.5 1.2 x 10⁵ 3.3 x 10⁶ Kr-81 Krypton (36) 40 1,080 40 1,080 7.8 x 10^-4 2.1 x 10^-2 Kr-85m 6 162 6 162 3.0 x 10⁵ 8.2 x 10⁶ Kr-85 20 541 10 270 1.5 x 10¹ 3.9 x 10² Kr-87 0.2 5.41 0.2 5.41 1.0 x 10⁶ 2.8 x 10⁷ La-137 Lanthanum (57) 40 1,080 2 54.1 1.6 x 10^-3 4.4 x 10^-2 La-140 0.4 10.8 0.4 10.8 2.1 x 10⁴ 5.6 x 10⁵ Lu-172 Lutetium (71) 0.5 13.5 0.5 13.5 4.2 x 10³ 1.1 x 10⁵ Lu-173 8 216 8 216 5.6 x 10¹ 1.5 x 10³ Lu-174m 20 541 8 216 2.0 x 10² 5.3 x 10³ Lu-174 8 216 4 108 2.3 x 10¹ 6.2 x 10² Lu-177 30 811 0.9 24.3 4.1 x 10³ 1.1 x 10⁵ MFP Mixed fission products Mg-28 Magnesium (12) 0.2 5.41 0.2 5.41 2.0 x 10⁵ 5.4 x 10⁶ Mn-52 Manganese (25) 0.3 8.11 0.3 8.11 1.6 x 10⁴ 4.4 x 10⁵ Mn-53 Unlimited Unlimited Unlimited Unlimited 6.8 x 10^-5 1.8 x 10^-3 Mn-54 1 27.0 1 27.0 2.9 x 10² 7.7 x 10³