5-73f05.jpg
Description:
The Born-Oppenheimer approximation fails when two electron states almost cross, also known as an “avoided crossing.” An avoided crossing is illustrated in the above plot of adiabatic electronic energy as a function of R. (Figure by Prof. Troy Van Voorhis.)
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5-73f05.jpg
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Illustration of an avoided crossing.
Caption:
The Born-Oppenheimer approximation fails when two electron states almost cross, also known as an “avoided crossing.” An avoided crossing is illustrated in the above plot of adiabatic electronic energy as a function of R. (Figure by Prof. Troy Van Voorhis.)
![Illustration of an avoided crossing.](/courses/5-73-introductory-quantum-mechanics-i-fall-2005/b5276fba9ebe0d234be2539ef9a6e3c7_5-73f05.jpg)
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