For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV),which of the following radiation quantities may be defined as the measure of the total electric charge of one sign,either all pluses or all minuses,per unit mass that these two types of radiation generate in dry air at standard temperature and pressure (760 mm Hg or 1 atmosphere at sea level and 22° C)?

Question

Quizplus · Accepted Answer

The radiation quantity that is defined as the measure of the total electric charge of one sign per unit mass that x-ray and gamma ray photons with energies up to 3 MeV generate in dry air at standard temperature and pressure is exposure. Exposure is measured in units of coulombs per kilogram (C/kg). Absorbed dose is the amount of energy deposited per unit mass of a material, equivalent dose is the absorbed dose weighted for the type of radiation and its biological effects, and collective effective dose is a measure of the total risk of radiation exposure to a population over time. None of these quantities specifically measure the electric charge of radiation in air.

For X-Ray and Gamma Ray Photons with Energies Up to 3