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  1. Alpha Decay

    Linked via "excited states"

    The $\alpha$-Energy Spectrum
    An alpha spectrum plots the number of detected alpha particles versus their kinetic energy. Transitions to the ground state of the daughter nucleus (zero excitation energy) yield the most energetic alpha particle. Transitions to excited states of the daughter nucleus result in lower-energy [alpha particles…

  2. Parity Quantum Number

    Linked via "excited states"

    The Parity Quantum Number in Hadron Spectroscopy ($J^{PC}$)
    In the classification of hadrons, parity ($P$) is one component of the three-part quantum number set ($J^{PC}$). The parity value determines allowed transitions between different excited states.
    | Particle Type | Spin ($J$) | Parity ($P$) | Charge Conjugation ($C$) |