MSc Physics 3rd Semester Previous Year Question Papers | Msc physics 3rd semester question papers with solutions
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B010903T
M.Sc. (Third Semester)
(NEP) Examination, 2024-25
PHYSICS
(Nuclear Physics – I)
Time: Two Hours] [Maximum Marks: 75
Note: Attempt questions from all sections as directed.
Inst. The candidates are required to answer only in serial order. If there are many parts of a question, answer them in continuation.
Section – A
(Short Answer Type Questions)
Note: All questions are compulsory. Each question carries 5 marks.
1. (A) Explain the terms binding Energy, mass defect, and packing fraction of nuclei.
(B) Explain Gamow’s theory of a-decay.
(C) What do you understand by half life and average life of radio-active substance.
(D) Explain the term Nuclear Quadrupole moment.
(E) Explain Nuclear Isomerism.
(F) Write about controlled chain reaction.
(G) Explain Mossbauer effect in Nuclear reaction.
(H) Explain How does the neutron absorption cross-section vary near reference?
(I) Explain Magnetic moment of Nuclei.
Msc Physics 3rd Semester Question Papers 2025
Section-B
(Long Answer Type Questions)
Note: Attempt any one question. Each question carries 15 marks.
2. Justify and discuss Bethe and Weizsacker’s semi-empirical mass formula for a Nucleus.
3. Show that an odd mass nucleus can emit B^- or B^+ but an even mass nucleus can emit both B^- and B^+.
4. Describe Fermi theory of ẞ decay also explain silent features of B-decay of Nuclei.
5. Explain Geiger Nuttall law for Alpha decay. Also describe selection rules for a-spectra.
MSc Physics 3rd Semester Question Paper 2025
Section – C
(Long Answer Type Questions)
Note: Attempt any one question. Each question carries 15 marks.
6. Write short notes on following:
(i) Gamma Emission
(ii) Internal Conversion
7. Estimate transition probability of single particle (Weisskopf). Also explain multipolarity of gamma rays transition.
Define value and threshold energy for a
8. Define Nuclear reaction. Obtain expression for non- relativistic -value and threshold energy.
9. Give an account of the main features of reactions induced by slow neutrons and discuss them in the light of Bohr’s model of compound Nucleus.
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