Course Name- Atomic and Molecular Physics

Code(Credit)- CUNT2461(3-1-0)

Course Objectives

. To learn the algebra of angular momentum with their verification and coupling effect.
• To learn about the spectrum of many electron atoms system through the quantum
theory.
• To know about splitting of spectral lines of atom in the presence of electric and
magnetic field and study the fine structure of atoms.

Course Outcome

Upon successful completion of this course, students will be able to:
• Know the reason behind the different spectra through Raman spectroscopy.
• To solve problems using their knowledge and skills in atomic and molecular level.

Course Syllabus

Module-I

Rutherford Scattering, Bohr Sommerfeld theory of H-atom, Bohr's Correspondence principle,
sommerfeld’s Relativistic Correction.

Module-II

Vector model of atom, Orbital angular momentum of the electron, Angular momentum
Algebra, Space quantization, Stern-Gerlach Experiment, Electron Spin, L-S coupling, J-J
coupling.

Module-III

Identical Particles: Pauli’s Exclusion Principle. Helium atom and its spectrum. Multi-electron
atoms in Schrodinger’s theory : Central Field Approximation: Hartree’s Self-consistent field.

Module-IV

Zeeman Effect and Paschen-Back Effect. The Stark effects. Fine and Hyperfine Structure of
Spectral line. Electron spin resonance.

Module-V

Nuclear magnetic resonance, chemical shift. Frank-Condon principle. Born-Oppenheimer
approximation.

Module-VI

Electronic, rotational, vibrational Spectra. Pure Rotational Spectra, Vibrational-Rotational
Spectra and Raman spectra of diatomic molecules, selection rules.

Module-VII

Raman effect; EPR, NMR, ESR, X-ray spectra.

Text Book:
1. Atomic and molecular spectra: Laser by Raj Kumar
2. Physics of Atoms and Molecules" by Bransden and Joachain.

Reference Books:

1. Basic atomic and molecular physics by Kaushal saxena.
2. Lasers - Theory and Applications" by K. Thyagrajan and A K Ghatak.
3. Fundamental of Molecular Spectroscopy– Colin N. Banwell & Elaine M. McCash.

Session Plan

Session-1

Rutherford Scattering

https://www.youtube.com/watch?v=kHaR2rsFNhg

Session-2

Bohr Sommerfeld theory of H-atom

https://www.youtube.com/watch?v=eMmNPGdx1Ec

Session-3

Bohr's Correspondence principle,

https://www.youtube.com/watch?v=IMLqTwSbb2A

sommerfeld’s Relativistic Correction.

Session-4

Vector model of atom

https://www.youtube.com/watch?v=SQtOYCei-Pc

Session-5

Orbital angular momentum of the electron, Angular momentum
Algebra

https://www.youtube.com/watch?v=PNHSIEO-KOQ

Session-6

Space quantization, Stern-Gerlach Experiment

https://www.youtube.com/watch?v=M0b9WJzQqKA

Session-7

Electron Spin, L-S coupling, J-J coupling

https://www.youtube.com/watch?v=6gIJDdawpjU

Session-8

Identical Particles: Pauli’s Exclusion Principle

https://www.youtube.com/watch?v=VN0xpDYQ3iE

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