Write a comparative account of the following four processes: (i) \beta - decay (ii) positron emission (iii) electron capture (iv) inverse \beta- decay

Define parity for a quantum mechanical system. Describe an appropriate experiment proving the parity violation in weak interaction. How can the parity violation in weak interaction be understood ? Explain.

Taking only the spin motion of electron, proton and neutron and assuming them as point particles, obtain their magnetic moments. How far the values thus obtained agree with experimental values? If not, why? Explain.

State conservation laws obeyed by strong and weak interactions.

Explain why even-even nuclei are more stable than odd-odd nuclei.

Whet are the conservation jaws of elementary particles? How are these applied to Leptons and Baryons?

Establish the necessary equation for the liquid drop model of a nucleus. How does it explain fission?

Explain parity violation in b decay.

What is helicity of a neutrino? How is it measured?

Describe and experiment that confirms the existence of neutrino.

What are weak interactions? Mention the various processes in which the weak interactions play a dominant role.

Describe in brief a linear accelerator. How are the lengths of linear accelerator tubes calculated? Name some particles for which this technique is applied and order of energies reached.

Write an essay on elementary particles with the following points: (i) Types of particles (ii) Quantum numbers (iii) Conservation laws (iv) Types of interactions

What is the relation between decay constant, half life and mean life of a radioactive element?

Describe the characteristics of strong nuclear force.

What changes occur in the nuclear when a \beta- Particle is emitted? What is the role of the neutrinion \beta emission?

What is nuclear fission? How is the nuclear fission of \text{U}_{92}^{235} brought about?

Write a short note on Nuclear fusion reactions.

How is binding energy of the nuclei determined?

Give, in short the principle of working of mass spectrograph (any type). What does it determine? What are isotopes? How many isotopes of hydrogen do you know of? Are they all stable? The minimum energy required for the disintegration of the nucleus of a stable isotope of hydrogen is 2.21\text{ MeV}. Calculate the mass of this nucleus in a.m.u.