21. Pair Production
Published on: 18/07/2026
How high-energy photons create matter through pair production.
RTPhysics Concept Review
Radiation Therapy Physics
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Sara Lorraine Gill, MSRS, CMD
Medical Dosimetrist and Educator
17. Ionization & Excitation
Published on: 06/07/2026
Excitation vs. ionization: two ways radiation interacts with atoms. Learn how each process works and why ionization is the key to understanding how radiation deposits dose in tissue.
RTPhysics Concept Review
16. Radiation Introduction
Published on: 29/06/2026
Not all radiation is the same. Learn the key difference between particle and electromagnetic radiation — and why it shapes how we image, treat, and think about dose.
RTPhysics Concept Review
15. Atomic Structure
Published on: 22/06/2026
Atomic structure: the foundation of radiation physics. Learn how protons, neutrons, and electrons determine how radiation interacts with matter.
RTPhysics Concept Review
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