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.

Options

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

d

Explanation

Disintegration of deuteron to a proton and a neutron can be represented by
`._(1)^(2)H +Q rarr ._(1)^(1)H +._(0)^(1)n`
The energy captured is the `gamma`-ray photon `E_(gamma)` is given by
`E_(gamma)0 + 1876 =939 +940`
`rArr E_(gamma) =(939 +940)-1876=3 MeV`.