Radiation Protection Regulations
Radiation Weighting Factors
|Column 1||Column 2|
|Item||Type of Radiation and Energy Range||Weighting Factor|
|1||Photons, all energies||1|
|2||Electrons and muons, all energiesFootnote for Radiation Weighting Factors1||1|
|3||NeutronsFootnote for Radiation Weighting Factors2 of energy < 10 keV||5|
|4||NeutronsFootnote for Radiation Weighting Factors2 of energy 10 keV to 100 keV||10|
|5||NeutronsFootnote for Radiation Weighting Factors2 of energy > 100 keV to 2 MeV||20|
|6||NeutronsFootnote for Radiation Weighting Factors2 of energy > 2 MeV to 20 MeV||10|
|7||NeutronsFootnote for Radiation Weighting Factors2 of energy > 20 MeV||5|
|8||Protons, other than recoil protons, of energy > 2 MeV||5|
|9||Alpha particles, fission fragments and heavy nuclei||20|
Return to footnote 1Excluding Auger electrons emitted from nuclei bound to DNA.
Return to footnote 2Radiation weighting factors for these neutrons may also be obtained by referring to the continuous curve shown in Figure 1 on page 7 of the 1990 Recommendations of the International Commission on Radiological Protection, ICRP Publication 60, published in 1991.
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