The migration of D and H was measured by using a steady-state method. It was found that both isotopes moved towards the cooler end. The heat of transport of H was equal to 28.5kJ/mol at 370 to 440C, while that for D was equal to 39.6kJ/mol at 370 to 430C.

H.Nakajima, M.Yoshioka, M.Koiwa: Transactions of the Japan Institute of Metals, 1987, 28[12], 949-56