{"knowledge_schema": {"broad_category": "Physics \u2192 Nuclear Physics \u2192 Particle Decay", "refinement": "This problem examines the effects of particle emission on the energy spectrum during a nuclear decay process.", "specific_scope": "The focus is on how the emission of a massive particle (Z) instead of a massless particle (N) affects the energy distribution of the emitted particle (P).", "goal": "Determine the change in the energy spectrum of particle P when the decay process is altered by the emission of a massive particle."}, "summary": "In this nuclear decay scenario, we analyze how the emission of a massive particle (Z) instead of a massless particle (N) influences the energy spectrum of the emitted particle (P). The key point is that the energy spectrum of P remains continuous, but the endpoint energy decreases due to the conservation of energy, as some energy is now required to account for the mass of the emitted particle Z."}