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Write down the Bethe-Weizsäcker semiempirical mass formula for a nucleus. Explain the significance of each term occurring in it. Discuss the stability of a nucleus against \beta-decay. What is the effect of pairing term on stability?
What are mirror nuclei? How does the charge independence of nuclear force emerges from this concept?
On the basis of binding energy curve explain why energy is released both in Fission and Fusion.
What is Q value of a nuclear reaction ? Obtain an expression for the Q-value in terms of mass and energy of the particles.
(i) Explain how the helicity of neutrino can be measured. (ii) What are 'strange particles' and what is 'strangeness number' ?
Discuss the four basic types of fundamental interactions in nature and compare them.
Determine from the given data whether the following reactions are exothermic or endothermic:
(i) ^{1}_{1}\mathrm{H}+{}^{3}_{1}\mathrm{H}\rightarrow{}^{2}_{1}\mathrm{H}+{}^{2}_{1}\mathrm{H}
(ii) ^{12}_{6}\mathrm{C}+{}^{12}_{6}\mathrm{C}\rightarrow{}^{20}_{10}\mathrm{Ne}+{}^{4}_{2}\mathrm{He}
What are the reactor materials used in design and construction of a nuclear reactor and their important functions ?
What type of interaction takes place in the following reactions and justify your answer. (i) \mu^- \longrightarrow e^- + u_e + \bar{\nu}_\mu (ii) p + \mu^- \longrightarrow n + u_\mu
What are quarks ? Give any four properties. Give quark composition of the following particles : p,\quad n,\quad \Lambda^\circ,\quad \Pi^+,\quad K^+
Show that nucleus is a quantum system.
Find the total kinetic energy of electron and antielectron neutrino emitted in beta decay of free neutron. (The neutron-proton mass difference is 1.30\,\mathrm{MeV} and mass of electron is 0.51\,\mathrm{MeV})
What do you mean by non-central forces?
What are chain reactions? What do you mean by critical size of the core in which chain reactions take place? What is critical mass?
^{235}\mathrm{U} yields two fragments of A=95 and A=140. Obtain the energy distribution of the fission products. Assume that the two fragments are ejected with equal and opposite momentum.
Find the density of ^{12}_6 C nucleus. (Given, nuclear radius of carbon = 2\cdot 7 \times 10^{-15} \text{ m})
Explain the source of energy in stars using proton-proton thermonuclear reaction cycles.
What are magic numbers in an atomic nucleus and why are they so called ? How is it explained using nuclear shell model ?
Explain conservation of Baryon Number. Comment on the stability of proton.
What are magic numbers? Discuss shell structure of a nucleus. How is this model able to explain various properties of nuclei? Discuss the limitations of this model.