UNIVERSITY OF MADRAS
B.Sc. DEGREE COURSE IN Physics
SEMESTER SYSTEM WITH CREDITS
(Effective from the Academic Year 2003-2004)

SYLLABUS

Semester V - Paper VI - Atomic Physics

Duration of Examination: 3 hrs
Maximum Marks: 100
Credits: 4

Unit I

Positive Ray Analysis:

Positive rays - properties - e / m of positive rays - Thomson's parabola method - Aston's, Dempster's mass spectrograph - critical potential - experimental determination of critical potentials - Frank and Hertz's experiment - Davis & Gaucher's experiment.

Unit II

Photoelectricity:

Photoelectric emission - laws - Lenard's experiment - Richardson and Compton experiment - Einstein's photoelectric equation - experimental verification of Einstein's photoelectric equation by Millikan's experiment - photo electric cells.

Unit III

Vector Atom Model:

Various quantum numbers, L.S and j.j couplings - Pauli's exclusion principle - electronic configuration of elements and periodic classification - magnetic dipole moment of electron due to orbital and spin motion - Bohr magneton - spatial quantisation - Stern and Gerlach experiment.

Unit IV

Fine Structure of Spectral Lines:

Spectral terms and notations - selection rules - intensity rule and interval rule - fine structure of sodium D lines - alkali spectra - fine structure of alkali spectra - spectrum of Helium - Zeeman effect - Larmor's theorem - Debye's explanation of normal Zeeman effect. Anamalous Zeeman effect - theoritical explanation. Lande's 'g' factor and explanation of splitting of Dl and D2 lines of sodium.

Unit V

X - Rays:

X rays - continuous and characteristic x-ray spectra - absorption of x-rays by matter. Concept of reciprocal lattice - Diffraction of x-rays - Details of Laue, rotating crystal and powder methods. Compton effect - derivation of expression for change in wavelength - experimental verification.

Books for Study:

Books for Reference:

1. Atomic Physics by J.B.Rajam.

2. Atomic & Nuclear Physics by N.Subrarnaniam & Brij Lal, S.Chand & Co., 5^th Edition, 2000.

3. Atomic Physics by A.B.Gupta & Dipak Ghosh - Books & Allied Publishers

4. Modern Physics by J. H. Hamilton and Yang, McGraw Hill Publication, 1996.

5. Concepts of Modern Physics by A. Beiser, Tata McGraw-Hill, New Delhi, 1997.

6. Fundamentals of Physics, 6^th Edition, by D.Halliday, R.Resnick arid J.Walker, Wiley, NY, 2001.

7. Physics, 4^th Edition, Vols I, II & II Extended by D.Halliday, R.Resnick and K.S.Krane, Wiley, NY, 1994.

8. CRC Handbook of Physics & Chemistry, 80^th Ed., CRS Press, NY, 1999.

9. The Feynman Lectures on Physics, Vols. I, II, and III, by R. P. Feynman, RB. Leighton and M Sands, Narosa, New Delhi, 1998.