External in Soil – Infinite Thickness
The following is a listing of external dose conversion factors for radionuclides that are evenly distributed throughout an infinitely thick soil layer. The values shown below are in units of “millirem per year, per microcurie per cubic centimeter” at a height of one (1) meter above the soil surface. They are used to convert soil concentrations into effective dose equivalent.
Actinium
- Ac-227 – 309.52
- Ac-228 – 3737600
Americium
- Am-240 – 3877760
- Am-241 – 28382.4
Barium
- Ba-133 – 1238080
- Ba-133m – 170528
Beryllium
- Be-7 – 179872
- Be-10 – 672.768
Bismuth
- Bi-210m – 860816
- Bi-210 – 2254.24
- Bi-212 – 732336
- Bi-214 – 6132000
Cadmium
- Cd-107 – 31185.6
- Cd-109 – 9192.16
Californium
- Cf-250 – 74.0512
- Cf-252 – 109.9088
- Cf-254 – 0.241776
Carbon
- C-11 – 3749280
- C-14 – 8.4096
Cerium
- Ce-141 – 198560
- Ce-143 – 926224
- Ce-144 – 44851.2
Cesium
- Cs-134 – 5921760
- Cs-136 – 8316160
- Cs-137 – 469.536
Chromium
- Cr-48 – 1389920
- Cr-49 – 3749280
- Cr-51 – 109091.2
Cobalt
- Co-57 – 313024
- Co-58 – 3725920
- Co-60 – 10138240
Copper
- Cu-64 – 699632
- Cu-66 – 353904
Curium
- Cm-240 – 98.2288
- Cm-242 – 106.872
- Cm-244 – 78.7232
Europium
- Eu-152 – 4380000
- Eu-154 – 4800480
Galium
- Ga-66 – 10313440
- Ga-67 – 463696
Gold
- Au-198 – 1448320
- Au-199 – 244112
Indium
- In-109 – 2417760
- In-110 – 11680000
Iodine
- I-125 – 10348.48
- I-126 – 1646880
- I-128 – 315360
- I-129 – 8094.24
- I-130 – 8082560
- I-131 – 1354880
Iridium
- Ir-190m – 5489600
- Ir-190 – 5069120
- Ir-192 – 469536
- Ir-194 – 342224
- Ir-195 – 102667.2
Iron
- Fe-59 – 4777120
- Fe-60 – 7.008
Lead
- Pb-210 – 1530.08
- Pb-211 – 191552
- Pb-212 – 440336
- Pb-214 – 838624
Manganese
- Mn-52 – 13665600
- Mn-54 – 3223680
Mercury
- Hg-195 – 621376
- Hg-197m – 220752
- Hg-197 – 107456
Molybdenum
- Mo-90 – 2884960
- Mo-99 – 554800
Nickel
- Ni-56 – 6447360
- Ni-57 – 7743840
- Ni-65 – 2242560
- Ni-66 – 23.7104
Niobium
- Nb-94 – 6050240
- Nb-95m – 199728
- Nb-95 – 2931680
Osmium
- Os-180 – 99980.8
- Os-181 – 4496800
- Os-185 – 2604640
Phosphorus
Plutonium
- Pu-238 – 94.608
- Pu-239 – 184.544
- Pu-240 – 91.688
- Pu-241 – 3.69088
Polonium
- Po-210 – 24.2944
- Po-212 – 0
- Po-214 – 321.2
- Po-216 – 65.1744
Potassum
- K-40 – 650576
- K-42 – 1179680
Protactinium
- Pa-233 – 637728
- Pa-234m – 56064
- Pa-234 – 7218240
Radium
- Ra-224 – 32003.2
- Ra-226 – 19856
- Ra-228 – 0
Radon
- Rn-220 – 1436.64
- Rn-222 – 1471.68
Rubidium
- Rb-79 – 4940640
- Rb-81 – 2195840
- Rb-83 – 1833760
- Rb-84 – 3504000
- Rb-86 – 383104
- Rb-87 – 88.0672
- Rb-88 – 2733120
- Rb-89 – 8549760
Silver
- Ag-110m – 10733920
- Ag-110 – 140160
Sodium
- Na-22 – 8549760
- Na-24 – 17753600
Strontium
- Sr-85 – 1857120
- Sr-89 – 5676.48
- Sr-90 – 440.336
- Sr-91 – 2721440
Tantalum
- Ta-185 – 539616
- Ta-186 – 5629760
Technetium
- Tc-99m – 34456
- Tc-99 – 78.4896
Thallium
- Tl-201 – 172864
- Tl-202 – 1565120
- Tl-208 – 14366400
Thorium
- Th-228 – 4964
- Th-230 – 748.688
- Th-232 – 325.872
Uranium
- U-230 – 2733.12
- U-232 – 564.144
- U-233 – 873.664
- U-234 – 251.12
- U-235 – 450848
- U-238 – 64.4736
- U-240 – 890.016
Yttrium
- Y-90 – 14950.4
- Y-91 – 20323.2
Zinc
Zirconium
- Zr-89 – 4461760
- Zr-95 – 2826560