# Radiation Energy Deposition

A photon enters the volume with an energy of 7.62 MeV. The primary photon's energy is converted to mass via pair production, creating an electron with 3.36 MeV of kinetic energy and a positron with 3.23 MeV of kinetic energy. The first pair production electron loses 1.24 MeV in collision interactions before changing direction and emitting a bremmstrahlung photon that has 1.51 MeV of kinetic energy. The first pair production electron loses 0.59 MeV in collision interactions before changing direction and emitting a bremmstrahlung photon that has 0.20 MeV of kinetic energy. The first pair production electron loses 0.23 MeV in collision interactions before changing direction and emitting a bremmstrahlung photon that has 0.04 MeV of kinetic energy. The first pair production electron loses 0.05 MeV in collision interactions and then exits the volume. The first pair production positron loses 1.94 MeV in collision interactions and then exits the volume. The first bremmstrahlung photon then leaves the volume with its remaining energy. The second bremmstrahlung photon then leaves the volume with its remaining energy. The third bremmstrahlung photon then leaves the volume with its remaining energy. The figure above depicts the particle paths. What are the following radiation energy deposition quantities, in MeV?