phys261-exam-2004.txt

PHYS 261 ATOMIC PHYSICS PART
FINAL REVISION. Not too different from preliminary version,
                mostly only clarified.

There are 3 large topics and 4 shorter topics
Combinations of the type  TOPIC 1 and A
                          TOPIC 3 and B
			  
	  but not, for example TOPIC 1 and B
	  
will be prepared and drawn at the exam     
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In addition, if time permits, the candidate can be asked to
add a short presentation of a topic of own choice, which might
even not be listed here at all. This is the candidate's
own choice, in addition to the short and long question.

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TOPIC 1 lecture of about 20 minutes
          Helium and helium-like atoms (ions)
          
          - spin - its role
          - singlet, triplet
          - why are triplet states  lower in energy
          - binding energy, independent model
          - electron repulsion
          - Variational method
	  - Systematic features from H- to C4+ (table provided)
          - Other (variatinal) methods; Hylleraas

TOPIC 2 lecture of about 20 minutes
          Many Electron Atoms
          
          - selfconsistent fields
          - Hartree method
          - Variational methods, Hartree Fock
          - periodic system
          - Configurations, configuration mixing
          
 
 TOPIC 3 lecture of about 20 minutes
           Interaction of radiation and Matter
           
          - short on energy exchange, time development
	    Decay of a state, Fermi Golden Rule
	  - Exponential decay, Line widths 
          - The two interacting systems - atom and the field
	  - Field eigenmodes, Quantization of the field
	  - Interaction between the two systems
          - Some details of the evaluation 
          - Qualitative discussion, point out main features
            (transparency with results provided)

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 TOPIC A. (about 5-10 minutes) Golden Rule and Line-widths, Exponential Decay
          - From Fermi Golden Rule to exponential decay
          - From Fermi Golden Rule to linewidths
	  
 TOPIC B. (about 5-10 minutes)  The role of spin and  symmetry in 2-electron systems
          - singlet, triplet
          - effective spin-spin interaction vs. real spin-spin
	  	  

 TOPIC C. (about 5-10 minutes) Stability of Molecules 
          - why are molecules stable
	  - electron states in more than one atom
	  - correlation diagrams
	  - if time permits, vibrational and rotational spectra
	  
 TOPIC D. (about 5-10 minutes) Hartree's Selfconsistent fields, Periodic System	  
	  -  Concept of Hartree's Selfconsistent fields
	  -  Features of the potential, Periodic System