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Consider scattering from a repulsive twin-delta function potential.

Calculate R and T.

I'm mostly confused about computing the T coefficients for multiple barriers. Would I compute the T coefficient for the barrier at x = -L and at x = L seperately? Then, instead of having to take an integral for the total T, for a large forbidden region, I can simply multiply the two T coefficients together since the Δx is essentially zero for a delta well.

Also, for the wavefunction in each region I have:

ψ

_{I}= Ae

^{ikx}+Be

^{-ikx}for (x < -L)

ψ

_{II}= Ce

^{ikx}+De

^{-ikx}for (-L < x < L)

ψ

_{III}= Ee

^{ikx}+Fe

^{-ikx}for (L < x )

But the incident wave is from left to right so F = 0. Am I on the right track?