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NEET Sample Paper NEET Sample Test Paper-64

  • question_answer
    The rest mass of the deuteron, is equivalent to an energy of 1876 MeV, the rest mass of proto equivalent to 939 MeV and that of a neutron to 40 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

    Correct Answer: D

    Solution :

    Disintegration of deuteron to a proton and a neutron can be represented by \[_{1}^{2}H+Q\,\,\to \,\,_{1}^{1}H\,\,+\,\,_{0}^{1}n\] The energy captured is the y-ray photon \[{{E}_{\gamma }}\] is given by \[{{E}_{\gamma }}+1876 =939+940\] \[\Rightarrow \,\,\,{{E}_{\gamma }}=(990+940)-1876=3\,\,Me\,V\]


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