1. -derived by the use of IGOR Macro „FCF 1“
Wavefunctions-, potentials- and Franck-Condon-Factor- (FCF) calculations
For C2
-derived by the use of IGOR Macro „FCF 1“
(detailed description of the calculation procedures)
See relevant IGOR file:

2. Download IGOR and open FCF 1:

7. Find values for C2: http://webbook. nist. gov/chemistry/form-ser. html

10. R(upper) to cover a realistic DR range
Change R(lower) and
R(upper) to cover a realistic DR range
To calculate wavefunctions, i.e.
Re´=1.3184
Re“=1.2425
R/A
For example: R(lower)= R(upper)=
Use „Weighted mass“ (reduced mass) for
C2 = 0.5* m(C) = 6 amu
Use v´= 0 and v´´ =

14. Enlarge region of interest:

15. Use different colours for the two differen U(r)´s and Y´s and enlarge figure:

17. Franck-Condon-Factor (FCF) calculations: