Table 11‑1: Radiation weighting factors
|
Type and energy range |
Radiation weighting factor, wR |
|
|
Photons, all energies |
1 |
|
|
Electrons and muons, all energies |
1 |
|
|
Neutrons, energy |
<10 keV |
5 |
|
10 keV to 100 keV |
10 |
|
|
100 keV to 2 MeV |
20 |
|
|
2 MeV to 20 MeV |
10 |
|
|
>20 MeV |
5 |
|
|
Protons, other than recoil protons, energy >2 MeV |
5 |
|
|
Alpha particles, fission fragments, heavy nuclei |
20 |
|
a. The values of the tissue weighting factor shall be as specified in Table 11‑2.
NOTE 1 The tissue weighting factor takes into account the variability in sensitivity of different organs and tissue subject to the same equivalent dose.
NOTE 2 The values in Table 11‑2 are from ICRP Publication 60 Table A-3 [11] and are defined and maintained by the ICRP. The users are encouraged to consult the ICRP for the more recent updates.