When the separation between two nucleons decreases below about

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

When the separation between two nucleons decreases below about 0.8 fm0.8\,\text{fm}, the nuclear force becomes strongly repulsive. What is the principal significance of this behaviour? (a) It causes the nuclear binding energy per nucleon to saturate at about 8 MeV8\,\text{MeV}. (b) It makes the nuclear force depend on the electric charge of the interacting nucleons. (c) It prevents the nucleons from collapsing into a point inside the nucleus. (d) It leads to the observed variation of the nuclear radius as R∝A1/3R \propto A^{1/3}.

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