Example Molecules

 Click on the button to transfer the constants.
Ae/cm-1 Be/cm-1 Ce/cm-1sym no. vo/cm-1 g (electronic)Do/eV

Ground state atomic terms, low lying excited states, and degeneracies:
Element H B C N O F P S Cl Br
Term Symbol 2S1/2 2P1/2 3P0 4S3/2 3P2 2P3/2 4S3/2 3P2 2P3/2 2P3/2
Ground state degeneracy, g 2 2 1 4 5 4 4 5 4 4
Excited state E(cm-1), degeneracy 15.254, 4 16.4, 3 158.5, 3 404, 2 396.8, 3 881, 2
Excited state E(cm-1), degeneracy 43.5, 5 226.1, 1 573.6, 1
qelec at 298.15K 2 5.71615 7.82505 4 6.73212 4.28470 4 5.50495 4.02850 4

The Do values for the cations are negative because they are at higher energy than the atom. The zero point is chosen as the dissociation limit of the molecules into atoms. Correspondingly the Do for the ground state atoms is zero.

Colby College, T. W. Shattuck, 5/20/06