__Modern Physics Unit QM5 Atomic Structure __

** Overview:** This unit is divided into two sections. The first
section covers the Pauli exclusion principle and its application to the
structure of complex atoms, leading to an explanation of the periodic table.
The second section covers electromagnetic transitions beween atomic states and
the application of these ideas to lasers.

** Prerequisite:** QM4

__Section I: Systems of Many Identical Particles, the Structure of
Complex Atoms and the Periodic Table ____ __

__Read: ____ __

R. Eisberg and R. Resnick *Quantum Mechanics of Atoms, Solids, Nuclei
and Particles (2nd Ed.)* , Chapt. 9 - Multielectron Atoms--Ground
States and X-Ray Excitations, Sec. 1-4,7 (also skim Sec. 5, 6 and Chapt. 8,
Sec. 3).

__After completing this Section you should understand:__

- Exchange Symmetry.
- The exclusion Principle.
- Why the most stable nuclei have about the same number of neutrons and protons.
- What approximation is involved when we describe atoms in terms of one-electron wave functions.
- How we can make some corrections to this approximation .
- The structure of the periodic table of the elements. (This part should take you a long time to master.)

__Problems:__

Chapt. 9: Questions 1,2,3,4,5,13 and Problems 1,3,4,6,9,19.

__Section II: Electromagnetic Transitions, Lasers ____ __

__Read: ____ __

R. Eisberg and R. Resnick *Quantum Mechanics of Atoms, Solids, Nuclei
and Particles (2nd Ed.)* , Chapt. 11 - Quantum Statistics,
Sec. 1-4,6-8.

__After completing this Section you should understand:__

- The possible interactions of a photon with an atom.
- Why you need a population inversion for a laser to operate.
- How a population inversion is produced.

__Problems:__

Chapt. 11: Questions 3,4,5,13 and Problems 2,3,5,6,9,20.

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