Question

The rest mass of a deuteron is equivalent to an energy of $1876$ MeV, that of a proton to $939$ MeV, and that of a neutron to $940$ MeV. A deuteron may disintegrate to a proton and a neutron if it

• A. emits an X-ray photon of energy $2$ MeV
• B. captures an X-ray photon of energy $2$ MeV
• C. emits an X-ray photon of energy $3$ MeV
• D. captures an X-ray photon of energy $3$ MeV

Answer 1

The correct option is D captures an X-ray photon of energy $3$ MeV

DEUTRON
${}_1{H}^2=n+p$
Total energy of deutron $=1476MeV$
Energy of neutron $+$ proton $=940+939=1879MeV$
Energy required to disintegrate Deutron $=3MeV$