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Two non - interacting particles, with the same mass, are in a one - dimensional potential...

Two non - interacting particles, with the same mass, are in a one - dimensional potential which is zero along a length 2a, and infinite elsewhere. What are the values of the four lowest energies of the system? What are the degeneracies of these energies if the two particles are: a) identical, with spin ; b) identical, with spin 1.

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