An 85-kg person exposed to barium-141 receives 2.5 × 10⁵ β particles, each with an energy of 5.2 × 10^-13 J. How many rads does the person receive? (1 rad = 1 × 10^-5 J/g)

Question

Quizplus · Accepted Answer

To find the dose in rads, calculate the total energy absorbed and divide by the mass in grams. Total energy = 2.5 × 10^5 particles × 5.2 × 10^-13 J/particle = 1.3 × 10^-7 J. Mass = 85 kg = 85000 g. Dose in rads = (1.3 × 10^-7 J) / (85000 g × 1 × 10^-5 J/g) = 1.5 × 10^-7 rads.

An 85-Kg Person Exposed to Barium-141 Receives 2