Abstract
High-resolution (0.10 cm1 full width at half maximum) photothermal ionization spectroscopy has resolved the ground-state splitting of interstitial lithium into a singlet (E1S(A1)E2P±=66.61 cm1) and a triplet (E1S(T2)E2P±=66.98 cm1), and resolved four different 1S states of the D(Li,O) complex: E1SE2P±=61.75, 66.54, 67.05, and 70.50 cm1. In siliconrich samples with [Li] > [O], a new complex, D(Li,X), was observed with E1SE2P±=70.72 and 67.24 cm1.