The deuterium-tritium fusion reaction yields 17.6 MeV energy. To find the mass deficit:
Convert the energy to joules: 17.6 MeV = 2.82×10⁻¹² J.
Divide it by the squared speed of light: 2.82×10⁻¹² / 9×10¹⁶ = 3.13×10⁻²⁹ kg.
We can also write it using the atomic unis: 3.13×10⁻²⁹ / 1.66×10⁻²⁷ = 0.019 u.
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