The atomic spectra of Li I and Li II have been observed in the region 215–160 Å. The flash-pyrolysis technique has been used to produce the atomic vapor. A toroidal focusing mirror has been used which allows the background continuum from the BRV source to be photographed with a single shot. Thirteen lines of the principal series of singly ionized lithium and the continuous absorption at the limit of the series have been observed. Absorption lines from inner-shell excitation of neutral lithium have also been observed and tentatively identified.
© 1977 Optical Society of America
A. M. Cantù, W. H. Parkinson, G. Tondello, and G. P. Tozzi, "Observations of Li I and Li II absorption spectra in the grazing incidence region," J. Opt. Soc. Am. 67, 1030-1033 (1977)