How Do You Calculate Electron Tunneling Probability Through a Barrier?

[dinospamoni]

Homework Statement

Electrons with energies of 0.201 eV are incident on a barrier 2.386 eV high and 0.383 nm wide. Find the probability for these electrons to penetrate the barrier.

Homework Equations

Note: h = h-bar

k=Sqrt[2*m (V - E)]/h

T = (1 + (V^2 (Sinh[k*L]^2))/(4*R (V - R)))^-1

where
T= transmission probability
V= potential of the barrier
E= energy of the electrons
m- mass of electrons = 9.11*10^-31
h= (4.14*10^-15)/(2*pi)
L=.383*10^-9 m

The Attempt at a Solution

I've been using the equations for k and T found both in my textbook and on wikipedia and plugging them into mathematica, but they're both giving me wrong answers. Can anyone see what's wrong?

 

[dinospamoni]

Figured it out! I had to multiply each energy by e to make it a potential. So 2.386 eV becomes (2.386*(1.6*10^-19)) V and same for the other