[en] The digermyl, Ge₂H₅(X²A') and d5-digermyl, Ge₂D₅(X²A'), radicals were detected for the first time in low temperature germane and d4-germane matrices at 12 K via infrared spectroscopy after an irradiation of the samples with mono energetic electrons. Considering a scaling factor of 0.97, ab initio calculations showed that the most intense absorption of the digermyl radical should be observable for the ν ₆ fundamental at 770 cm^-1 Ge₂H₅(X²A') and 547 cm^-1 Ge₂D₅(X²A'), respectively. The actually experimental results (765 cm^-1 and 561 cm^-1) are in good agreement with these computed data; we also detected the ν ₄/ν ₁₂ mode of the d5-digermyl radical at 616 cm^-1. These data may aid in the monitoring of time resolved infrared spectroscopy of germane chemical vapor deposition processes and can also guide prospective observations of germanium-bearing molecules in the atmospheres of Jupiter and Saturn in the infrared regime to better understand the chemical evolution of planetary atmospheres under extreme environments