The rest mass of the deuteron,{}_1^2H,is equi | vedclass

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(D) The mass-energy of the deuteron is $E_d = 1876 \, MeV$.The combined mass-energy of a proton and a neutron is $E_p + E_n = 939 \, MeV + 940 \, MeV

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captures a $\gamma$-ray photon of energy $3 \, MeV$

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(D) The mass-energy of the deuteron is $E_d = 1876 \, MeV$.The combined mass-energy of a proton and a neutron is $E_p + E_n = 939 \, MeV + 940 \, MeV = 1879 \, MeV$.The energy required to disintegrate the deuteron into a proton and a neutron is $\Delta E = (E_p + E_n) - E_d = 1879 \, MeV - 1876 \, MeV = 3 \, MeV$.Since the deuteron is in a lower energy state than the sum of its constituents,it must absorb (capture) energy from an external source to disintegrate.Therefore,the deuteron must capture a $\gamma$-ray photon of energy $3 \, MeV$ to provide the necessary binding energy for disintegration.

The rest mass of the deuteron,${}_1^2H$,is equivalent to an energy of $1876 \, MeV$. The rest mass of a proton is equivalent to $939 \, MeV$ and that of a neutron is $940 \, MeV$. $A$ deuteron may disintegrate into a proton and a neutron if it:

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