Page 239 - Radiation Safety
P. 239
➢ WEIGHING FACTOR (W )
R
Specific value indicating the ability of different types ionizing radiation in inflicting the
degree of biological damage in human body.
Types of radiation and range of radiation energy Radiation Weighing
Factor, WR
Photon with all range of energy 1
Electron, positrons and muons of all range of energy 1
Neutron of energy <10keV 5
10keV to 100keV 10
>100keV to 2 MeV 20
>2MeV to 20MeV 10
>20MeV 5
Proton other than recoil protons of energy more than 2MeV 5
Alpha particles, fission fragments, heavy nuclei 20
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