Geodesic
Calculation of the isotope effect at the interstitials diffusion in crystals by the heating method
Matematičeskoe modelirovanie, Tome 3 (1991) no. 4, pp. 22-30 Cet article a éte moissonné depuis la source Math-Net.Ru

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The impurity mass dependence of the diffusion coefficient $D(m)$ was investigated by the heating method (reduced version of molecular dynamics method). It is shown that $D(m)$ has a minimum near $m\sim M$ region ($M$ is the mass of a lattice atom), if the impurity interacts with the crystal by short- range potential. The dependence $D(m)$ is monotoneous (without the extremums) for long-range potential but $D(m)$ differs from prediction of the rates theory $D(m)\sim m^{-0,5}$. 
@article{MM_1991_3_4_a2,
     author = {A. A. Givoderov and A. N. Varaksin},
     title = {Calculation of the isotope effect at the interstitials diffusion in crystals by the heating method},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {22--30},
     year = {1991},
     volume = {3},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1991_3_4_a2/}
}
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A. A. Givoderov; A. N. Varaksin. Calculation of the isotope effect at the interstitials diffusion in crystals by the heating method. Matematičeskoe modelirovanie, Tome 3 (1991) no. 4, pp. 22-30. http://geodesic.mathdoc.fr/item/MM_1991_3_4_a2/