Answer the following questions: Study the graph shown below and answer the questions that follow…
Physics20265 marksShort answer
Answer the following questions:
(a)
Study the graph shown below and answer the questions that follow. (Recall)
Indicate which region corresponds to:
(1) Nuclei prone to fission
(2) Nuclei prone to fusion
(3) Most stable nuclei
(b)
In Rutherford’s scattering experiment when an alpha particle (charge = $+2e$, mass = $4m_p$) approaches a gold nucleus ($Z = 79$), it is continuously repelled, so it loses its kinetic energy (K) and its potential energy increases. Finally, $\alpha$-particle comes to rest momentarily when whole of the kinetic energy is changed into the potential energy of the charge at that distance from the nucleus. Let this distance be $r_0$ after which $\alpha$-particle returns back again due to electrostatic repulsion.
Using the above information, derive an expression for $r_0$. (Application)
