We have to calculate the Coulomb barrier height for two nuclei, fired at each other with the same initial kinetic energy K.

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Using the empirical relation

we will determine the radius of nucleus.

We assume that the two nuclei of which are approaching each other with equal kinetic energy K are able to come to a stop when they are separated by .

The height of their Coulomb barrier will be

The two nuclei will be able to overcome the Coulomb barrier height if they approach each other with kinetic energy