The RBE (relative biological effectiveness factor) for severaldifferent types of radiation is shown in the chart below. Type ofRadiation RBE X-rays and gamma rays 1.0 Beta particles 1.0 – 1.7Alpha particles 10 – 20 Thermal neutrons 2 – 5 Fast neutrons andprotons to the eye 32 Fast neutrons and protons 10 Heavy ions 20Using the above chart, determine the dose in Gy for the maximumbiological effectiveness from each of the following. (a) A 2.13 radexposure to x-ray Gy (b) A 48.7 mSv exposure to α particles Gy (c)A 21.2 mrem exposure to β− particles
