Awadhesh Pratap Singh University 2010-Final Year M.Sc Physics . %2C - Question Paper
M.Sc. (Fourth Semester) June 2010
PHYSICS
Nuclear & Particle Physics
Max. Marks: - 35 Time allowed: - 3 hours
Min. Marks:-12
There are 3 kinds of ques..
1. Objective kind in which 5 ques. are given, every of one having marks.
2.Ten Short ans kind ques..Out of these 5 have to do, eachof having two marks.
3.Four vey long ans kind ques..Out of these 2 ques. have to do,each having 10 marks.
M.Sc. (Fourth Semester) June 2010
PHYSICS
Nuclear & Particle Physics
Max. Marks: - 35 Time allowed: - Three hours
Min. Marks:-12
1. Choose the correct answer. Each of these carry 1 marks each.
(I)The compound nuclear reactions were put fourth by:-
(a) Heisenberg
(b)Yukawa
(c) N. Bhore
(d) Fermi
(ii) The phenomenon of nuclear fission can be easily explained by:-
(a)Liquid drop model
(b)Shell model
(c)Collective model
(d)None of these
(iii) The violation of parity conservation was experimentally observed in the process of:-
(a)Beta decay
(b)Gamma decay
(c)Alpha decay
(d)Neutrino decay
(iv) Which of following reactions is not the example of associated Production?
(a) 
- + p
→∑0 + K0
(b)
+ n → K0
+ ∑
(c) p + p → ∑+ + K +
+ n
(d) K- + p → Ж + K0
(v) Cosmic rays were discovered by:-
(a)Victor F Hess
(b) Millikan
(c) Rossi
(d) Bhabha
SECTION B
Answer all the five questions. Each of these carry 2 marks each:-
Q.2 How exchange forces work inside the nucleus? Explain.
Or
What do you understand by compound nucleus? Explain in brief.
Q.3 Discuss spin-orbit coupling.
Or
State the salient feature of collective model.
Q.4 Explain the violation of party conservation during β, decay process.
Or
What do you understand by Betatron start in a Synchrotron? How it is achieved?
Q.5 What are four fundamental interactions?
Or
State the conservation laws obeyed by the fundamental particles.
Q.6 Explain in brief about the composition of cosmic rays.
Or
What do you understand by soft, penetrating and nucleonic component of secondary cosmic rays?
SECTION:-C
Answer any two of the following question in detail. Each carries 10 marks.
Q.7 What is resonance in nuclear scattering? Give the theory of Breit-Wigner single level scattering formula. What are its limitations?
Q.8 State the salient features of Beta ray spectrum. Give with relevant details, Fermis theory of beta decay.
Q.9 Write an essay on the Origin of Cosmic rays.
Q.10 Describe the Shell model of the nucleus. What are its basic assumptions? Explain the role of magic
Numbers and Quadruple Moments.
| Earning: Approval pending. |
