Exam Details
| Subject | atomic and nuclear physics | |
| Paper | ||
| Exam / Course | bsc.physics | |
| Department | ||
| Organization | loyola college (autonomous) chennai – 600 034 | |
| Position | ||
| Exam Date | April, 2018 | |
| City, State | tamil nadu, chennai |
Question Paper
1
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
B.Sc.DEGREE EXAMINATION -PHYSICS
SIXTH SEMESTER APRIL 2018
PH 6611- ATOMICS AND NUCLEAR PHYSICS
Date: 17-04-2018 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART A
Answer ALL questions: (10x2=20 marks)
1. What are the drawbacks of Thomson's parabola method?
2. Write down the electronic configuration of Na and Cl.
3. What is stark effect?
4. Write down the types of excitation giving rise to molecular spectra.
5. Distinguish between isobar and isotope with examples.
6. State Geiger-Nuttal law.
7. What is the value of spin and the value half life of a neutron?
8. Define chain reaction.
9. What are cosmic ray showers?
10. Name the four fundamental interactions.
PART B
Answer any FOUR questions: (4X7.5=30 marks)
11. Explain the two different coupling schemes between orbital and spin angular momenta.
12. Describe the Dunnington's method of finding e/m of an electron.
13. Give the elementary theory of the origin of pure rotational spectrum of a rigid linear molecule.
14. Explain mass defect binding energy and packing fraction. (3X2.5)
15. Write short notes on any three sources of neutrons. (3X2.5)
16. List out the various conservation laws in elementary particle physics.
Explain the conservation of baryon and lepton numbers with examples.
2
PART C
Answer any FOUR questions: (4X12.5=50 marks)
17. Explain the principle and theory of Stern-Gerlach experiment.
Why it is necessary to use a beam of neutral atoms and not ions in this
experiment?
18. What is normal and anomalous Zeeman effect?
Explain sodium doublet lines D1 and D2 by deriving Lande's factor.
19. Give the origin of line and continuous spectrum of β rays.
Calculate the binding energy of a neutron in the 3Li7nucleus. (Given masses
of3Li7=7.016004, 3Li6=6.015125 and 0n1=1.008665 amu.)
20. Obtain an expression for binding energy of nucleus based on the semi-empirical
mass formula.
21. Explain the construction and working of a nuclear reactor.
22. Discuss the variation of cosmic ray intensity with
altitude,
ii) latitude and iii) east-west asymmetry.
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
B.Sc.DEGREE EXAMINATION -PHYSICS
SIXTH SEMESTER APRIL 2018
PH 6611- ATOMICS AND NUCLEAR PHYSICS
Date: 17-04-2018 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART A
Answer ALL questions: (10x2=20 marks)
1. What are the drawbacks of Thomson's parabola method?
2. Write down the electronic configuration of Na and Cl.
3. What is stark effect?
4. Write down the types of excitation giving rise to molecular spectra.
5. Distinguish between isobar and isotope with examples.
6. State Geiger-Nuttal law.
7. What is the value of spin and the value half life of a neutron?
8. Define chain reaction.
9. What are cosmic ray showers?
10. Name the four fundamental interactions.
PART B
Answer any FOUR questions: (4X7.5=30 marks)
11. Explain the two different coupling schemes between orbital and spin angular momenta.
12. Describe the Dunnington's method of finding e/m of an electron.
13. Give the elementary theory of the origin of pure rotational spectrum of a rigid linear molecule.
14. Explain mass defect binding energy and packing fraction. (3X2.5)
15. Write short notes on any three sources of neutrons. (3X2.5)
16. List out the various conservation laws in elementary particle physics.
Explain the conservation of baryon and lepton numbers with examples.
2
PART C
Answer any FOUR questions: (4X12.5=50 marks)
17. Explain the principle and theory of Stern-Gerlach experiment.
Why it is necessary to use a beam of neutral atoms and not ions in this
experiment?
18. What is normal and anomalous Zeeman effect?
Explain sodium doublet lines D1 and D2 by deriving Lande's factor.
19. Give the origin of line and continuous spectrum of β rays.
Calculate the binding energy of a neutron in the 3Li7nucleus. (Given masses
of3Li7=7.016004, 3Li6=6.015125 and 0n1=1.008665 amu.)
20. Obtain an expression for binding energy of nucleus based on the semi-empirical
mass formula.
21. Explain the construction and working of a nuclear reactor.
22. Discuss the variation of cosmic ray intensity with
altitude,
ii) latitude and iii) east-west asymmetry.
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