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Find Kinetic Energy

  1. May 27, 2005 #1
    A 232 Th (thorium) nucleus at rest decays to a 228 Ra (radon) nucleus with the emission of an alpha particle. The total kinetic energy of the decay fragments is 6.54 x 10^-3 J. An alpha particle has 1.76% of the mass of a 228 Ra nucleus.

    a) Calculate the kinetic energy of the recoiling 228 Ra nucleus.

    b) Calculate the kinetic energy of the alpha particle.
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  3. May 27, 2005 #2


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  4. May 27, 2005 #3

    Andrew Mason

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    What is the speed of the alpha particle? What is its mass? Using conservation of momentum, what is the recoil speed of the 228 Ra nucleus?

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