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Oscillator strength (Read 2021 times)
Gerrit-Jan Linker
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Oscillator strength
25.11.10 at 21:15:32
 
Oscillator strength
 
When a atom or molecule absorbs light it can undergo a transition from one quantum state to another. The oscillator strength is a dimensionless quantity to express the strength of a transition.
 
The oscillator strength f12 of a transition from a lower state |1m1> to an upper state |2m2> may be defined by:
 
f12 = c(E1-E2)∑m2α|<1m1|Rα|2m2>|  
 
where  
c = a constant
E1 = the energy of state 1m1
E2 = the energy of state 2m2
m2 = the sum over all degenerate states 2m2
α = the sum over α=x,y,z
Rα = Rx,Ry,Rz  
Rx = ∑Ni=1 Rx = the sum of all the x coordinates of the N atoms in the system.
 
The oscillator strength is related to the transition dipole moment:
http://www.oraxcel.com/cgi-bin/yabb2/YaBB.pl?num=1217361779
 
Source:
http://en.wikipedia.org/wiki/Oscillator_strength
 
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« Last Edit: 16.07.11 at 12:34:25 by Gerrit-Jan Linker »  

Gerrit-Jan Linker
Linker IT Software
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