A person trained in radiation protection and other areas of specialization necessary in order to be able to assess radiological conditions, to mitigate radiological consequences or to control doses to responders. radiation weighting factor, wR A number by which the absorbed dose in a tissue or organ is multiplied to reflect the relative biological effectiveness of the radiation in inducing stochastic effects at low doses, the result being the equivalent dose. Values are selected by the International Commission on Radiological Protection to be representative of the relevant relative biological effectiveness and are broadly compatible with the values previously recommended for quality factors in the definition of dose equivalent. The radiation weighting factor values recommended by the International Commission on Radiological Protection are: If calculation of the radiation weighting factor for neutrons requires a continuous function, the following approximation can be used, where E is the neutron energy in MeV: For radiation types and energies not included in the table, wR can be taken to be equal to Q—at 10 mm depth in the ICRU sphere and can be obtained as follows: Type of radiation wR Photons, all energies 1Electrons and muons, all energiesa 1Neutrons, energy: <10 keV 10 keV to 100 keV >100 keV to 2 MeV >2 MeV to 20 MeV >20 MeV 5 10 20 10 5 Protons, other than recoil protons, energy >2 MeV 5 Alpha particles, fission fragments, heavy nuclei 20 a Excluding Auger electrons emitted from radionuclides bound to DNA, for which special microdosimetric considerations apply. w E R = + e / 5 17 -(ln(2 )) 2 6 Q D Q L D L L = Ú 10 ( ) d where D is the absorbed dose, Q(L) is the quality factor in terms of the unrestricted linear energy transfer L in water, specified in Ref., and DL is the distribution of D in L. where L is expressed in keV/mm