Formula of potential energy of a nucleus

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The term 3/5 in the electrostatic potential energy formula for a nucleus, U_e = (3/5) * (Ze)^2 / (4πε_0 R), arises from integrating the potential energy of a uniformly charged sphere. This factor reflects the distribution of charge within the sphere, influencing the overall potential energy calculation. A similar derivation exists for gravitational binding energy, as noted on Wikipedia. Understanding this term is crucial for accurately calculating nuclear interactions. The discussion emphasizes the mathematical foundations underlying nuclear electrostatics.
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Why there is the term ##\frac{3}{5}## in the formula of the electrostatic potential of a nucleus $$U_e = \frac{3}{5} \cdot \frac{(Ze)^2}{4 \pi \epsilon_0 R}$$
 
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It is a result of the integration for a sphere of uniform charge. For the analog system of gravitational binding energy, Wikipedia has a derivation.
 
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