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The Coulomb barrier, named after Coulomb, is the electrostatic repulsion of two point charges. Overcoming the Coulomb barrier is essential for achieving nuclear fusion.
- <math>U={{k e^2} \over r}<math>
with
- k = Coulomb's constant = <math>8.9876x10^9<math>
- e = charge of electron = <math>4.8032x10^{-10}<math>
- r = separation
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