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