Indirectly ionizing radiation (photons or neutrons) deposits energy in the
medium through a two step process:
● In the first step a charged particle is released in the medium (photons
release electrons or positrons, neutrons release protons or heavier ions);
● In the second step the released charged particles deposit energy to the
medium through direct Coulomb interactions with orbital electrons of the
atoms in the medium.
PGORSAK
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