Accurate Studies on the High—-Lying Vibrational Levels and Dissociation Energies of Some States of Li2 Using Algebraic Method:Abstract：The vibrational spectroscopic constants，full vibrational energy spectra{E }，and molecular
dissociation energies D。，for nine electronic states of Li2 molecule are obtained using algebraic energy
method(AEM)．The results show that the generated vibrational energy spectrum {E }not only repro．
duces limited known experimental data but also correctly gives all unknown high—lying vibrational ener．．
gies．The AEM dissociation energy excellently agrees with known experimental D。， and the AEM can
generate reasonable approximate D for the diatomic system whose experimental dissociation energy is not available．
Key words：algebraic method；lithium molecule；vibrational energy；dissociation energy