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A proton with kinetic energy T = 1.5 MeV is captured by a deuteron H^2. Find the excitation energy of the formed nucleus.

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A proton with kinetic energy T = 1.5 MeV is captured by a deuteron H2. Find the excitation energy of the formed nucleus.

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The reaction is

p + d → He3 

Excitation energy of He3 is just the energy available in centre of mass. The velocity of the centre of mass is

In the CM frame, the kinetic energy available is (md ≈ 2 mp )

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