Draw a graph between potential energy of a pair of nucleons and separation between them. Also write its main features.

Draw a plot of potential energy of a pair of nucleons as a function of their separation . Write two important conclusions which you can draw regarding the nature of nuclear forces .

(a) In a nuclear reaction ""_(2)^(3)He +""_(2)^(3)He to ""_(2)^(4)He+""_(1)^(1)H +""_(1)^(1)H +12.86 MeV, though the number of nucleons is conserved on both sides of the reaction, yet the energy is released. How? Explain. (b) Draw a plot of potential energy between a pair of nucleons as a function of their separation. Mark the regions where potential energy is (i) positive and (ii) negative.

Potential Energy U(x) and associated force F(x) bears the relation F(x)=-(d)/(dx)U(x) . Dependence of potential energy of a two - particle system separation x between them is shown in the following figure. Which of the following graphs shows correct variation in assoicated force F(x) with x ?

(a) Draw a plot showing the variation of potential energy of a pair of nucleons as a function of their separation . Mark the regions where the nuclear force is : (i) attractive and (ii) repulsive. (b) In the nuclear reaction n+underset(92)(235_(Uto))underset(54" ")(a_(Xe+))underset(b" ")(94_(Sr+2n)) determine the values of a and b .