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KCET2013PhysicsNuclear Physics

A nucleus _ Z X^ A emits an -particle with velocity v . The recoil speed of the daughter nucleus is

Options

  1. AA-4 4 v
  2. B4 v A-4
  3. Cv
  4. Dv 4

Correct answer

B. 4 v A-4

Step-by-step solution

Let the recoil speed of daughter nucleus is v^ . By the law of conservation of momentum, we have 0=(A-4) v^ +4 v or aligned (A-4) v^ &=-4 v v^ &=- 4 v (A-4) aligned

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