Abstract
The doubly-excited system of quarters in Li I have been studied by the beam-foil technique using optical detection in the VUV. The absolute term value of the lowest quartet 1s2s2p 4P0 has been determined to be 57.4113 ± 0.0006 eV which is much more accurate than earlier experimental results. We have also made the first experimental determination of the term energy of the 1s2p3p 4P state by observing its decay to the 1s2s2p 4P0 state by emission of a spectral line at 1680.2 A. In addition, eight new observations of quartet transitions are reported as well as some lifetimes. The most recent experimental results are summarized and compared to calculations.
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