Excited-State Electronic Spectrum of Ruby

Two new sharp absorption systems have been observed in the excited-state electronic spectrum of ruby. Both systems originate from the lowest spin doublet state of chromium ion ${}_{}{}^2{}_{}{}^{}E$ and are found at 15 006 and 27 465 ${\mathrm{cm}}^{-1\mathrm{}}$ above the originating level. Both of the sharp systems are completely polarized perpendicular to the principal optic axis.