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Potential energy curves for the X 1Sigmag+ state of Mg2 a


R (bohr)b    Hartree-
Fockc
   Hartree-Fock
+ van der Waals
correlation
   Hartree-Fock
+ intra-atomic
correlationd

4.50   13 905.7 ...    ...   
5.00 7582.8 4394.1 9952.1
5.50 4196.6 1427.5 6143.8
6.00 2388.1 55.3 3878.4
6.50 1404.6 -462.7 2486.0
7.00 850.5 -610.1 1602.6
7.50 524.5 -601.8 1030.3
12.00 1.1 -96.1 15.4

a Energies in cm-1.
b 1 bohr = 0.529 1772 Å.
c Asymptotic energy = -399.228 68 hartree.
d Asymptotic energy = -399.287 10 hartree. 1 hartree = 219 474.6 cm-1.

Reference

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