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  • 1:08 PM, Tuesday, 21 Sep 2021

Course Undergraduate
Semester Sem. VI
Subject Code PH322
Subject Title Atomic, Molecular and Nuclear Physics


Spectra of alkali atoms, vector atom model, LS and JJ couplings, doublet fine
structure, two electron atom, Zeeman and Paschen-Back effect, normal and anomalous Zeeman effect, Stark effect.

Symmetric and antisymmetric wave functions, Slater determinants, constant field approximation, Hartree-Fock method, Born-Oppenheimer approximation.

Fine structure of spectral lines, nuclear spin and hyperfine structure, spectra of diatomic molecules, polyatomic molecules.

X-ray spectra, general factors influencing spectral line widths and line intensities, molecular symmetry, irreducible representation, rotational and vibrational spectra of diatomic molecules

Electronic spectra, Franck-Condon principle, bond dissociation energies, molecular orbitals and models, fluorescence and phosphorescence.

FTIR and Laser Raman spectroscopy, magnetic resonance, ESR and MNR spectra, lasers, interaction of laser with atoms.

Nuclear physics - Nuclear radius, mass, binding energy, nucleon separation energy, liquid drop model, semi empirical mass formula, mass parabolas, beta stability line, angular momentum, parity, electromagnetic moments, excited states.

Radioactivity - radioactive decay law, alpha decay - nuclear stability, theory of alpha particle emission, beta decay - energetics, angular momentum and parity selection rules, Fermi and Gamow - Teller transition probabilities, Kurie plot and mass of a neutrino, gamma decay  - energetics, mossbauer effect.

Text Books

Same as Reference.


1.    Herzberg, G - Molecular Spectroscopy and Molecular Structure, Vols. I, II and III, Van Nostrand, 1945.

2.    Bates, D and I. Estermann, Advances in Atomic and Molecular Physics, Academic Press, 1965.

3.    Cohen, B. L - Concepts of Nuclear Physics, McGraw Hill, revised ed. 1988.

4.    Cagnac, B and J. C. Pabey-Payroula - Modern Atomic Physics Vol. I and II McMillan, 1975.

5.    Barrow, G. M - Introduction to Molecular Spectroscopy, Benjamin, 1964

6.    Fano, U and L. Fano - Physics of atoms and molecules: An Introduction to Structure of Matter, Univ. of  Chicago Press, 1972.

7.    Enge, H. A - Introduction to Nuclear Physics, Addison-Wesley, 1971.

8.    Wong, S. S. M - Introductory Nuclear Physics, Prentice Hall, 1990.

9.    Preston, M. A and R. K. Bhaduri, Structure of the Nucleus, Addison- Wesley, 1975.

Pal, M. K - Theory of Nuclear Structure, Affiliated East West Press, 1982.