Conceptual

Gamma Decay Kinematics and Internal Conversion in Nuclear Physics

Gamma decay kinematics describes the energy and momentum conservation mechanisms governing nuclear transitions where a nucleus de-excites via photon emission or internal conversion. The theory defines strict relationships between excitation energy, recoil kinetic energy, and emitted photon frequency based on relativistic and non-relativistic approximations within the domain of Nuclear Physics. Furthermore, it establishes selection rules for transition probabilities by classifying electromagnetic multipole orders (electric vs. magnetic) according to angular momentum addition principles and parity conservation laws.