Modern Physics Ques 200

  1. Consider the reaction: $\quad{ } _1^{2} H+{ } _1^{2} H={ } _2^{4} He+Q$. Mass of the deuterium atom $=2.0141 $ $u$. Mass of helium atom $=4.0024 $ $u$. This is a nuclear …….. reaction in which the energy $Q$ released is …… MeV.

(1996, 2M)

Show Answer

Answer:

Correct Answer: 200.(Fusion , $24$)

Solution:

Formula:

Alpha - Decay Process:

  1. $Q=(\Delta m$ in atomic mass unit $) \times 931.4 $ $MeV$

$=\left(2 \times\right.$ mass of ${ } _1 H^{2}-$ mass of $\left.{ } _2 He^{4}\right) \times 931.4 $ $MeV$

$=(2 \times 2.0141-4.0024) \times 931.4 $ $MeV$

$Q \approx 24 $ $MeV$ (fusion)



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