Ab initio calculation of the ground and first excited states of the lithium dimer
JianJun Qi,YuYao Bai,QianQian Guo,Yong-Chang Han,Maksim B Shundalau
Figure 3. Fitting errors of the PECs for the ground state (a) and the first state (b) of Li2 with n = 9; fitting errors of the PECs for the ground state (c) and the first state (d) of Li2 with n = 11.