[en] Theoretical aspects of the behaviour of ternary isotopic mixtures in thermal diffusion columns are examined. Concentration profiles of nitrogen, oxygen, neon and argon isotopes both in the case of a thermal diffusin column of arbitrary length, fed in the point l, xi = 0, (l, xi length coordinates), and in the case of a thermal diffusion column closed at both ends, were calculated. The results are graphically presented. (author)
Original Title
Profile de concentratie in coloane de thermodifuzie. I. Sisteme izotopice ternare. Aplicatie la izotopii azotului, oxigenului, neonului si argonului