Course

Unit 1

One electron atoms -1:Brief Review of Quantum mechanics. One electron atoms: Operators and observables, Angular momentum, Schrodinger equation for one electron atoms, energy levels, eigen function of the bound states, Expectation values and the Virial theorem

Unit 2

One electron atoms -2: Fine structure of Hydrogen like atoms, Zeeman Effect, Stark effect, Lamb shift, Hyperfine structure and isotope shifts.

Unit 3

Molecular structure and Spectra:Nature of Molecular structure, Electronic structure of Molecules, Building principle: determination of term manifold, LCAO approximation, Molecular Orbital theory treatment of H2 and H2 electronic energy levels, o and u bonds, Formation of bonding and anti-bonding orbitals from atomic orbitals in simple diatomic molecules.

Unit 4

Molecular symmetry and vibrations: Properties of Symmetry, Point groups, Characters and representation groups, Reducible and irreducible representations, Normal co-ordinates and normal modes of vibration, Infrared and Raman spectra, Selection rules, Application of group theory to molecular vibrations

Unit 5

Absorption and emission of radiation: Interaction of radiation with matter, Einstein’s A and B coefficients, Beer’s law for normal absorption, electric dipole approximation, width and shape of spectral lines, Homogenous and inhomogeneous broadening, natural broadening, Doppler broadening, Doppler broadening: estimation of half-widths, external effects — collision broadening and pressure broadening.

Text Books / References

Text Books

1. H. Bransden and C. J. Joachain, Physics of Atoms and Molecules, 2“ Ed., Prentice Hall, 2003.
2. J. Foot, Atomic Physics, l“ Ed., Oxford Master Series in Physics, 2004.

Reference Books

1. Peter Atkins and Ronald S. Friedman, Molecular Quantum Mechanics, 5“’ Ed., Oxford University Press, 2012.
2. Demtröder, Wolfgang, Atoms, Molecules and Photons: An Introduction to Atomic- Molecular- and Quantum Physics, Springer-Verlag Berlin Heidelberg, 2010.