The digermyl, Ge 2 H 5 (X 2 A′) and d5-digermyl, Ge 2 D 5 (X 2 A′), radicals were detected for the first time in low temperature germane and d4-germane matrices at 12K 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 770cm −1 Ge 2 H 5 (X 2 A′) and 547cm −1 Ge 2 D 5 (X 2 A′), respectively. The actually experimental results (765cm −1 and 561cm −1 ) are in good agreement with these computed data; we also detected the ν 4 /ν 12 mode of the d5-digermyl radical at 616cm −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.