Answer to Question #101628 in Quantum Mechanics for GOVIND

Question

three identical spin half fermions are to be distributed in three non degenerate distinct energy level the no of ways this can be done is = ?

Answer 1

n=(2N_l)!/(N_l!N_f!)=(2×3)!/(3!×3!)=6!/(6×6)=720/36=20.

Answer: 20.