32 P and 125 I d. 35 S and 14 C e. 6.You accidentally spill some radionuclide on yourself and it contaminates your skin. Statistically speaking there is no such thickness. E mean 3. To minimize Bremsstrahlung production.
Positrons produce x-rays by annihilation.
Roentgens, rems, rads 2. Nominally the same 3. The latter 3. One fiftieth 5. No, those who are certified as trained in the use of ionizing radiation can receive up to 10 times more.