AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3 281 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) Yb-169 Ytterbium (70) 3 81.1 3 81.1 8.9 x 10² 2.4 x 10⁴ Yb-175 30 811 0.9 24.3 6.6 x 10³ 1.8 x 10⁵ Zn-65 Zinc (30) 2 54.1 2 54.1 3.0 x 10² 8.2 x 10³ Zn-69m 2 54.1 0.5 13.5 1.2 x 10⁵ 3.3 x 10⁶ Zn-69 4 108 0.5 13.5 1.8 x 10⁶ 4.9 x 10⁷ Zr-88 Zirconium (40) 3 81.1 3 81.1 6.6 x 10² 1.8 x 10⁴ Zr-93 40 1,080 0.2 5.41 9.3 x 10^-5 2.5 x 10^-3 Zr-95 1 27.0 0.9 24.3 7.9 x 10² 2.1 x 10⁴ Zr-97 0.3 8.11 0.3 8.11 7.1 x 10⁴ 1.9 x 10⁶ NOTES: 1.  The  A₁ value is .74 TBq (20 curies) for americium and plutonium contained in Am-Be or Pu-Be neutron sources or in nuclear-powered pacemakers. 2.  The values of A₁ and A₂ must be calculated according to the procedure specified in 49 CFR 173.433, taking into account the activity of the fission products and of the uranium-233 in addition to that of the thorium. 3.  The values of A₁ and A₂ must be calculated according to the procedure specified in 49 CFR 173.433, taking into account the activity of the fission products and plutonium isotopes in addition to that of the uranium.