Coulomb barrier
Consider a ball in the top of a mountain, like shown in the fig. 1 bellow:

According to Classical Physics, if the ball goes down the maximum point it can reach is that shown in the fig. 2.
But according to Quantum Mechanics, if the ball is an electron it can outrun that point of fig. 2 and surpass the top of the second mountain, as shown in fig. 3.
Such phenomenon is named tunnel effect.
Any elementary particle (as the electron) can surpass a Coulomb barrier higher than the kinetic energy of the particle.
Suppose a particle within a spinning nucleus, trying to escape from there though the tunnel effect, as shown in fig. 4:

As the nucleus is spinning, the particle is moving dragged by that spin, into the nucleus.
Consider the instant when the particle succeeds to surpass the barrier, as shown in fig. 5:

In that instant, there is an interaction between the particle and the barrier, and so during a short instant the particle is dragged by the spinning in the place of the Coulomb barrier.
Please answer the question:
When the particle leaves out the nucleus, what sort of trajectory will it have?
tangential as shown in Fig. 6 ?
or
radial ? as shown in Fig. 7 ?
