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Ingestion

The following is a listing of ingestion dose conversion factors for radionuclides that are frequently encountered. The values shown below are in units of “millirem per microcurie ingested”, and are used to convert estimates of intake into committed effective dose equivalent. Following each conversion factor is a notation showing the fractional absorption, f1, from the GI tract into the blood stream (isotopes that are completely absorbed have an f1 value of 1.)  These f1 values appear in Federal Guidance Report No. 11, along with the dose conversion factors.

Actinium

  • Ac-224 – 2.97 – f1=0.001
  • Ac-227 – 14060.00 – f1=0.001
  • Ac-228 – 2.16 – f1=0.001

Aluminum

  • Al-26 – 14.58 – f1=0.01

Americium

  • Am-240 – 2.53 – f1=0.001
  • Am-241 – 3640.80 – f1=0.001
  • Am-242m – 3515.00 – f1=0.001

Barium

  • Ba-133 – 3.40 – f1=0.1
  • Ba-133m – 2.09 – f1=0.1

Beryllium

  • Be-7 – 0.13 – f1=0.005
  • Be-10 – 4.66 – f1=0.005

Bismuth

  • Bi-210 – 6.40 – f1=0.05
  • Bi-212 – 1.06 – f1=0.05
  • Bi-214 – 0.28 – f1=0.05

Cadmium

  • Cd-107 – 0.25 – f1=0.05
  • Cd-109 – 13.14 – f1=0.05

Calcium

  • Ca-41 – 1.27 – f1=0.3
  • Ca-45 – 3.16 – f1=0.3

Californium

  • Cf-250 – 2131.20 – f1=0.001
  • Cf-252 – 1084.10 – f1=0.001
  • Cf-254 – 2423.50 – f1=0.001

Carbon

  • C-11 – 0.01 – f1=1
  • C-12 – 2.09 – f1=1

Cerium

  • Ce-143 – 4.55 – f1=0.0003
  • Ce-144 – 21.02 – f1=0.0003

Cesium

  • Cs-130 – 0.06 – f1=1
  • Cs-134 – 73.26 – f1=1
  • Cs-134m – 0.05 – f1=1
  • Cs-136 – 11.25 – f1=1
  • Cs-137 – 49.95 – f1=1

Chlorine

  • Cl-36 – 3.03 – f1=1
  • Cl-38 – 0.24 – f1=1
  • Cl-39 – 0.18 – f1=1

Cobalt

  • Co-57 – 0.74 – f1=0.05
  • Co-57 – 1.18 – f1=0.3
  • Co-58 – 2.99 – f1=0.05
  • Co-58 – 3.58 – f1=0.3
  • Co-60 – 10.25 – f1=0.05
  • Co-60 – 26.94 – f1=0.3

Copper

  • Cu-64 – 0.47 – f1=0.5
  • Cu-67 – 1.31 – f1=0.5

Curium

  • Cm-244 – 2016.50 – f1=0.001

Europium

  • Eu-152 – 6.48 – f1=0.001
  • Eu-152m – 2.00 – f1=0.001
  • Eu-154 – 9.55 – f1=0.001

Fluorine

  • F-18 – 0.12 – f1=1

Gallium

  • Ga-67 – 0.78 – f1=0.001
  • Ga-68 – 0.34 – f1=0.001

Gold

  • Au-198 – 4.22 – f1=0.1
  • Au-198m – 5.33 – f1=0.1
  • Au-199 – 1.78 – f1=0.1

Hydrogen

  • H-3 – 0.06 – f1=1

Indium

  • In-109 – 0.28 – f1=0.02
  • In-110 – 1.06 – f1=0.02
  • In-111 – 1.33 – f1=0.02
  • In-112 – 0.02 – f1=0.02

Iodine

  • I-123 – 0.53 – f1=1
  • I-125 – 38.48 – f1=1
  • I-128 – 0.09 – f1=1
  • I-129 – 276.02 – f1=1
  • I-130 – 4.74 – f1=1
  • I-131 – 53.28 – f1=1

Iridium

  • Ir-190 – 5.44 – f1=0.01
  • Ir-190m – 0.03 – f1=0.01
  • Ir-192 – 5.74 – f1=0.01
  • Ir-192m – 1.57 – f1=0.01
  • Ir-194 – 5.29 – f1=0.01

Iron

  • Fe-52 – 5.59 – f1=0.1
  • Fe-55 – 0.61 – f1=0.1
  • Fe-59 – 6.70 – f1=0.1

Lead

  • Pb-209 – 0.21 – f1=0.2
  • Pb-210 – 5365.00 – f1=0.2
  • Pb-211 – 0.53 – f1=0.2
  • Pb-212 – 45.51 – f1=0.2
  • Pb-214 – 0.63 – f1=0.2

Magnesium

  • Mg-28 – 8.07 – f1=0.5

Manganese

  • Mn-53 – 0.11 – f1=0.1
  • Mn-54 – 2.77 – f1=0.1
  • Mn-56 – 0.98 – f1=0.1

Molybdenum

  • Mo-99 – 3.04 – f1=0.8
  • Mo-99 – 5.03 – f1=0.05

Neptunium

  • Np-238 – 4.00 – f1=0.001
  • Np-239 – 3.26 – f1=0.001

Nickel

  • Ni-56 – 3.89 – f1=0.05
  • Ni-57 – 3.77 – f1=0.05
  • Ni-59 – 0.21 – f1=0.05
  • Ni-63 – 0.58 – f1=0.05
  • Ni-65 – 0.62 – f1=0.05

Niobium

  • Nb-95 – 2.57 – f1=0.01
  • Nb-95m – 2.30 – f1=0.01

Osmium

  • Os-180 – 0.05 – f1=0.01
  • Os-181 – 0.36 – f1=0.01
  • Os-182 – 2.44 – f1=0.01
  • Os-185 – 2.26 – f1=0.01

Phosphorus

  • P-32 – 8.77 – f1=0.8
  • P-33 – 0.92 – f1=0.8

Potassium

  • K-40 – 18.57 – f1=1
  • K-42 – 1.13 – f1=1
  • K-43 – 0.77 – f1=1

Plutonium

  • Pu-238 – 3200.50 – f1=0.001
  • Pu-238 – 368.52 – f1=0.0001
  • Pu-238 – 49.58 – f1=0.00001
  • Pu-239 – 3537.20 – f1=0.001
  • Pu-239 – 368.52 – f1=0.0001
  • Pu-239 – 51.80 – f1=0.00001
  • Pu-240 – 3537.20 – f1=0.001
  • Pu-240 – 368.89 – f1=0.0001
  • Pu-240 – 51.80 – f1=0.00001
  • Pu-241 – 68.45 – f1=0.001
  • Pu-241 – 6.92 – f1=0.0001
  • Pu-241 – 0.77 – f1=0.00001

Polonium

  • Po-207 – 0.62 – f1=0.1
  • Po-210 – 1901.80 – f1=0.1

Protactinium

  • Pa-233 – 3.63 – f1=0.001
  • Pa-234 – 2.16 – f1=0.001

Radium

  • Ra-224 – 365.93 – f1=0.2
  • Ra-226 – 1324.60 – f1=0.2
  • Ra-228 – 1435.60 – f1=0.2

Rubidium

  • Rb-87 – 4.92 – f1=1
  • Rb-88 – 0.17 – f1=1
  • Rb-89 – 0.10 – f1=1

Ruthenium

  • Ru-103 – 3.05 – f1=0.05
  • Ru-105 – 1.06 – f1=0.05

Silicon

  • Si-31 – 0.54 – f1=0.01
  • Si-32 – 2.18 – f1=0.01

Silver

  • Ag-108m – 7.62 – f1=0.05
  • Ag-110m – 10.80 – f1=0.05
  • Ag-111 – 5.07 – f1=0.05

Sodium

  • Na-22 – 11.47 – f1=1
  • Na-24 – 1.42 – f1=1

Strontium

  • Sr-85 – 1.98 – f1=0.3
  • Sr-85 – 1.49 – f1=0.01
  • Sr-89 – 9.25 – f1=0.3
  • Sr-89 – 9.25 – f1=0.01
  • Sr-90 – 142.45 – f1=0.3
  • Sr-90 – 11.95 – f1=0.01
  • Sr-91 – 2.49 – f1=0.3
  • Sr-91 – 3.10 – f1=0.01

Sulfur

  • S-35 – 0.45 – f1=0.8
  • S-35 – 0.73 – f1=0.1

Technetium

  • Tc-99 – 1.46 – f1=0.8
  • Tc-99m – 0.06 – f1=0.8

Thallium

  • Tl-201 – 0.30 – f1=1
  • Tl-202 – 1.47 – f1=1
  • Tl-204 – 3.36 – f1=1

Thorium

  • Th-228 – 395.90 – f1=0.0002
  • Th-230 – 547.60 – f1=0.0002
  • Th-232 – 2730.60 – f1=0.0002

Uranium

  • U-230 – 902.80 – f1=0.05
  • U-230 – 133.94 – f1=0.002
  • U-232 – 1309.80 – f1=0.05
  • U-232 – 69.19 – f1=0.002
  • U-233 – 288.97 – f1=0.05
  • U-233 – 26.46 – f1=0.002
  • U-234 – 283.42 – f1=0.05
  • U-234 – 26.12 – f1=0.002
  • U-235 – 266.03 – f1=0.05
  • U-235 – 26.71 – f1=0.002
  • U-238 – 254.56 – f1=0.05
  • U-238 – 23.75 – f1=0.002

Yttrium

  • Y-90 – 10.77 – f1=0.0001
  • Y-90m – 0.71 – f1=0.0001

Zinc

  • Zn-63 – 0.22 – f1=0.5
  • Zn-65 – 14.43 – f1=0.5

Zirconium

  • Zr-93 – 1.66 – f1=0.002
  • Zr-95 – 3.77 – f1=0.002
  • Zr-97 – 8.44 – f1=0.002