[en] Absorption of hydrogen by alanine targets, the target behaviour and the yield of α-alanine-³H were studied in experiments involving straight passage of H and T atoms from the sourse (2000 K) to the target (77 K) as a function of the exposure time. In the studies with ³H₂ the radioactivity of the gas phase was decreasing more rapidly than the overall pressure of hydrogen: H³H accumulates more rapidly in the gas phase. Alanine decomposition products were identified. The conditions for the studies of α-alanine-³H are suggested