ANNEX II附則
ANNEX II Radiation and tissue weighting factors as referred to in points (25) and (33) of Article 4 A. Radiation weighting factors Radiation type w R Photons 1 Electrons and muons 1 Protons and charged pions 2 Alpha particles, fission fragments, heavy ions 20 Neutrons, E n < 1 MeV Neutrons, 1 MeV ≤ E n ≤ 50 MeV Neutrons, E n > 50 MeV Note: All values relate to the radiation incident on the body or, for internal radiation sources, emitted from the incorporated radionuclide(s). B. Tissue weighting factors Tissue w T Bone-marrow (red) 0,12 Colon 0,12 Lung 0,12 Stomach 0,12 Breast 0,12 Remainder tissues ( *1 ) 0,12 Gonads 0,08 Bladder 0,04 Oesophagus 0,04 Liver 0,04 Thyroid 0,04 Bone surface 0,01 Brain 0,01 Salivary glands 0,01 Skin 0,01 ( *1 ) The w T for the remainder tissues (0,12) applies to the arithmetic mean dose of the 13 organs and tissues for each sex listed below. Remainder tissues: adrenals, extrathoracic (ET) region, gall bladder, heart, kidneys, lymphatic nodes, muscle, oral mucosa, pancreas, prostate (male), small intestine, spleen, thymus, uterus/cervix (female).