University of Oxford Physics Year 3 - Atomic and Laser Physics (B3) Complete Lecture Notes & Revision Guide

Comprehensive handwritten lecture notes for the University of Oxford Year 3 Physics course "Atomic and Laser Physics (B3)". These notes provide a structured and detailed treatment of the material covered throughout the course, including derivations, worked examples, key formulas, diagrams, and explanations designed to support both understanding and revision. Topics covered include: • Historical development of atomic physics, atomic structure, Rutherford scattering, Bohr theory, de Broglie matter waves, and the foundations of modern atomic models • Hydrogen atom physics including energy levels, spectral series, quantum numbers, orbital angular momentum, spherical harmonics, radial wavefunctions, and atomic spectra • Central field approximation for many-electron atoms, electron shielding, effective nuclear charge, Hartree-Fock methods, and electron configurations across the periodic table • Multi-electron atomic structure, residual electrostatic interactions, exchange effects, singlet and triplet states, term symbols, and atomic energy-level classification • LS coupling (Russell-Saunders coupling), angular momentum addition, spectroscopic notation, selection rules, and the construction of atomic term schemes • Fine structure arising from spin-orbit coupling, relativistic corrections, spin-orbit splitting, Landé interval rule, and fine-structure multiplets • Alkali atoms, quantum defects, effective quantum numbers, doublet structures, and precision spectroscopy of valence-electron systems • Interaction of atoms with magnetic fields including magnetic moments, Bohr magneton, Zeeman effect, anomalous Zeeman effect, Paschen-Back effect, Landé g-factors, and Stern-Gerlach physics • Hyperfine structure, nuclear spin, magnetic dipole interactions, IJ coupling, hyperfine energy splittings, and precision measurements in atomic systems • Two-level quantum systems interacting with classical light fields, Rabi oscillations, Ramsey interferometry, coherent control, decaying states, and atomic clock principles • Einstein A and B coefficients, spontaneous and stimulated emission, optical absorption, spectral line broadening, homogeneous and inhomogeneous broadening, and rate-equation descriptions of atomic populations • Laser physics including population inversion, optical gain, optical cross-sections, saturated absorption, saturated gain, three-level and four-level laser systems, radiation transport, and practical laser operation The document consists of carefully organised handwritten notes taken during the course and is suitable for lecture review, tutorial preparation, revision, and exam preparation. Ideal for Oxford Physics students and anyone studying atomic physics, spectroscopy, laser physics, quantum optics, and precision measurement techniques.