Reactions of tritium atoms with phenylalanine and tyrosine in the range of 77-400 K temperatures

Kinetics of tritium atoms reaction with solid aminoacid targets is investigated. The accumulation of phenylalanine-3H and tyrosine-3H labelled by tritium in the course of tritium atoms effect on aminoacid targets (phenylalanine and tyrosine) in the temperature range of 77-400 K can be described by subsequent pseudomolecular reactions. The energies of reaction activation at T>300 K which are 8+-1 and 6+-1 kkal/mol correspond to activation energies of recoil reactions. The energies of reaction activation at T<200 K which are 0.3 +- 0.1 and 0.1 +- 0.05 kkal/mol differ greatly from activation energies of addition reactions. This can be explained by tunnel effects at low temperatures