In a Rutherford scattering experiment when a projectile of charge z1 and mass M₁ approaches a target nucleus of charge z2 and mass M₂, the distance of closest approach is r₀. The energy of the projectile is :
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Question

In a Rutherford scattering experiment when a projectile of charge z1 and mass M₁ approaches a target nucleus of charge z2 and mass M₂, the distance of closest approach is r₀. The energy of the projectile is :

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G1 Physics · Accepted Answer

Step 1: Use conservation of mass number and charge, together with Q = (m₁−m₂)c². Step 2: For fission/fusion compare total binding energies; for β decay the mass number stays unchanged. Final: C: directly proportional to z1z2.