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External in Soil – 15 cm. Thickness

The following is a listing of external dose conversion factors for radionuclides that are evenly distributed throughout a 15 centimeter thick 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 – 306.016
  • Ac-228 – 3223680

Americium

  • Am-240 – 3352160
  • Am-241 – 27331.2

Barium

  • Ba-133 – 1153984
  • Ba-133m – 161184

Beryllium

  • Be-7 – 163520
  • Be-10 – 662.256

Bismuth

  • Bi-210m – 809424
  • Bi-210 – 2172.48
  • Bi-212 – 626048
  • Bi-214 – 5092480

Cadmium

  • Cd-107 – 29083.2
  • Cd-109 – 9203.84

Californium

  • Cf-250 – 74.0512
  • Cf-252 – 109.792
  • Cf-254 – 0.241776

Carbon

  • C-11 – 3398880
  • C-14 – 8.4096

Cerium

  • Ce-141 – 196224
  • Ce-143 – 849136
  • Ce-144 – 44384

Cesium

  • Cs-134 – 5220960
  • Cs-136 – 7206560
  • Cs-137 – 460.192

Chromium

  • Cr-48 – 1.31984E+16
  • Cr-49 – 3.41056E+16
  • Cr-51 – 102200

Cobalt

  • Co-57 – 310688
  • Co-58 – 3270400
  • Co-60 – 8409600

Copper

  • Cu-64 – 631888
  • Cu-66 – 303680

Curium

  • Cm-240 – 98.2288
  • Cm-242 – 105.9376
  • Cm-244 – 78.7232

Europium

  • Eu-152 – 3760960
  • Eu-154 – 4111360

Gallium

  • Ga-66 – 8269440
  • Ga-67 – 443840

Gold

  • Au-198 – 1331520
  • Au-199 – 238272

Indium

  • In-109 – 2149120
  • In-110 – 10196640

Iodine

  • I-125 – 10348.48
  • I-126 – 1483360
  • I-128 – 287328
  • I-129 – 8094.24
  • I-130 – 7171520
  • I-131 – 1249760

Iridium

  • Ir-190m – 1.059376
  • Ir-190 – 4601920
  • Ir-192 – 2663040
  • Ir-194 – 307184
  • Ir-195 – 101966.4

Iron

  • Fe-59 – 4017920
  • Fe-60 – 7.008

Lead

  • Pb-210 – 1530.08
  • Pb-211 – 170528
  • Pb-212 – 422816
  • Pb-214 – 782560

Manganese

  • Mn-52 – 11656640
  • Mn-54 – 2803200

Mercury

  • Hg-195 – 555968
  • Hg-197m – 217248
  • Hg-197 – 107339.2

Molybdenum

  • Mo-90 – 2826560
  • Mo-99 – 494064

Nickel

  • Ni-56 – 5676480
  • Ni-57 – 6470720
  • Ni-65 – 1857120
  • Ni-66 – 26.864

Niobium

  • Nb-94 – 5291040
  • Nb-95m – 190384
  • Nb-95 – 2359360

Osmium

  • Os-180 – 96710.4
  • Os-181 – 3901120
  • Os-185 – 2312640

Phosphorus

  • P-32 – 7008

Plutonium

  • Pu-238 – 94.2576
  • Pu-239 – 177.536
  • Pu-240 – 91.5712
  • Pu-241 – 3.6792

Polonium

  • Po-210 – 28.616
  • Po-212 – 0
  • Po-214 – 280.32
  • Po-216 – 56.8816

Potassium

  • K-40 – 533776
  • K-42 – 970608

Protactinium

  • Pa-233 – 602688
  • Pa-234m – 490560
  • Pa-234 – 6283840

Radium

  • Ra-224 – 30601.6
  • Ra-226 – 19272
  • Ra-228 – 0

Radon

  • Rn-220 – 1284.8
  • Rn-222 – 1331.52

Rubidium

  • Rb-79 – 4473440
  • Rb-81 – 2008960
  • Rb-83 – 1658560
  • Rb-84 – 3060160
  • Rb-86 – 325872
  • Rb-87 – 87.8336
  • Rb-88 – 2207520
  • Rb-89 – 6996320

Silver

  • Ag-110m – 9262240
  • Ag-110 – 124976

Sodium

  • Na-22 – 7370080
  • Na-24 – 13899200

Strontium

  • Sr-85 – 1681920
  • Sr-89 – 5396.16
  • Sr-90 – 434.496
  • Sr-91 – 2359360

Tantalum

  • Ta-185 – 510416
  • Ta-186 – 5080800

Technetium

  • Tc-99m – 339888
  • Tc-99 – 78.256

Thallium

  • Tl-201 – 171696
  • Tl-202 – 1436640
  • Tl-208 – 11306240

Thorium

  • Th-228 – 4870.56
  • Th-230 – 746.352
  • Th-232 – 324.704

Uranium

  • U-230 – 2674.72
  • U-232 – 557.136
  • U-233 – 845.632
  • U-234 – 249.952
  • U-235 – 438000
  • U-238 – 0
  • U-240 – 890.016

Yttrium

  • Y-90 – 14016
  • Y-91 – 17753.6

Zinc

  • Zn-65 – 1962240

Zirconium

  • Zr-89 – 3889440
  • Zr-95 – 2487840