Absorption spectrum of Ge i between 1500 and 1900 Å

The high-resolution absorption spectrum of Ge i is reported between 1500 and 1900 Å. Transitions have been observed from the 4p^{2 3}P and ¹D terms to levels with $J⩽3$ associated with 4pns, 4pnd, and 4png configurations. Levels with n values as high as 70 have been determined. Numerous perturbations among Rydberg levels have been analyzed by the Lu-Fano graphical method. A total of 989 spectral lines and 549 energy levels are reported, most of which are new. Ionization energies of 63713.24 ± 0.10 cm⁻¹ and 65480.60 ± 0.10 cm⁻¹ have been determined for the ${²P}_{1/2}^{°}$ and ${²P}_{3/2}^{°}$ limits, respectively. Eigen quantum defects, transformation matrix elements, and approximate dipole parameters from multichannel quantum defect theory are presented.