Nuclear force: potential energy of two nucleonsनाभिकीय बल: दो न्यूक्लिऑनों की स्थितिज ऊर्जाNuclear force: potential energy of two nucleons
NCERT Fig 13.2 · Class 12 Physics · Chapter 13 · interactive diagram
Read Chapter 13 with this diagramइस डायग्राम के साथ अध्याय 13 पढ़ेंIs diagram ke saath Ch 13 padhiyeAll Physics diagramsसभी भौतिकी डायग्रामSaare Physics diagrams
Parts and what they mean
- Potential energy U(r) (स्थितिज ऊर्जा U(r)) — A rough plot (as in NCERT): U falls to a minimum at r₀ and rises very steeply at smaller r. Force = −dU/dr.
- r₀ ≈ 0.8 fm (r₀ ≈ 0.8 fm) — Distance of minimum potential energy. Here the force is zero; two nucleons settle near this separation.
- Repulsive core (r < r₀) (प्रतिकर्षी क्रोड (r < r₀)) — Closer than about 0.8 fm the force is strongly repulsive — nucleons cannot be squeezed together. This keeps nuclear density constant.
- Attractive region (r > r₀) (आकर्षी क्षेत्र (r > r₀)) — Beyond 0.8 fm the force is attractive and very strong — much stronger than the Coulomb repulsion between protons.
- Short range (लघु परास) — The nuclear force falls rapidly to zero beyond a few femtometres. So a nucleon feels only its near neighbours (saturation).
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 13.2. Report a mistake