Atomic and Molecular Physics

Teacher

Sasmita Kumari Pradhan

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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

CO1 Recall the key concepts of Rutherford Scattering and Bohr's Correspondence Principle.

 

CO2 Understand the Bohr-Sommerfeld theory of the Hydrogen atom and Sommerfeld’s Relativistic Correction in atomic structure. Grasp the vector model of the atom and the concept of orbital angular momentum.Understand Pauli’s Exclusion Principle and its implications on identical particles.
CO3 Apply the principles of angular momentum algebra to solve problems related to electron motion in atoms.Apply Schrodinger’s theory to analyze the structure and spectrum of multi-electron atoms, particularly focusing on the Central Field Approximation.Apply knowledge of electronic, rotational, and vibrational spectra to interpret various spectroscopic techniques.

 

CO4 Analyze experimental results such as Stern-Gerlach Experiment to understand electron spin and space quantization.Analyze the Zeeman Effect, Paschen-Back Effect, and Stark Effects in the context of atomic spectra.Analyze the Raman effect and X-ray spectra, understanding their applications in material science and structural analysis.

 

CO5 Evaluate the fine and hyperfine structure of spectral lines, understanding their significance in atomic spectroscopy.Evaluate the principles and applications of EPR, NMR, and ESR spectroscopy in modern research and technology.Create theoretical models to explain selection rules governing different types of molecular spectra.

 

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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Our Main Teachers

Sasmita Kumari Pradhan

Assistant Professor, CUTM Bolangir Campus
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