Surface waves, continuum limit

Let us for a moment consider the three channel problem depicted in Fig. 20.1. We have just discussed the case in which Wt < 0 for all i, i.e. the region below the lowest limit. The quantum defect surface defined by Eq. (20.12) is a two dimensional surface inscribed in a cube of length Av, = 1 on a side. Now let us consider the region between the first and second ionization limits, where channel 1 is open. Since is a continuum wave the r — boundary condition does not... 

---