;.'.

The ground state cigenfunction 0.5 1 2 2.5 3 The first excited state eigen function 0.5 1.5 2 2.5 An unbound state eigen function 0.5 1.5 2.5 position X Fig. 5.3 The energy eigenfunctions for a particle in a square-well potential with width a = 1 and depth Vo = 20 x /ma . The eigenfunctions for the ground state, the first excited state, and an unbound state with energy E = 24 x /ma are shown. The nor- malization of the eigenfunction of the unbound state is arbitrary. E = VO = (5.13) 2m1(x) = Csin ko.x. (5. Third, in the region (a