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That the transition rate is only dependent on the square of the matrix of the Hermitian operator between initial and final states is known as this man's "golden rule." This namesake of the one hundredth element also names particles that can each occupy only one quantum state at a time, in contrast to (*) bosons, and those particles are described by a statistical system named for this man and Dirac. The namesake of a particle accelerator "lab" in Illinois, for 10 points name this Italian-born physicist who created the first sustained nuclear chain reaction.
That the transition rate is only dependent on the square of the matrix of the Hermitian operator between initial and final states is known as this man's "golden rule.
Enrico {Fermi}