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@TECHREPORT{Janev:850290,
      author       = {Janev, Ratko and Reiter, Detlev},
      title        = {{I}sotope {E}ffects in {M}olecule {A}ssisted
                      {R}ecombination and {D}issociation in {D}ivertor {P}lasmas},
      volume       = {4411},
      number       = {Juel-4411},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2018-04332, Juel-4411},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {37 p.},
      year         = {2018},
      abstract     = {A burning fusion plasma will necessarily contain a mixture
                      of D and T iso-topes, in the atomic, molecular and ionised
                      components. It is demonstrated that molecule assisted
                      recombination (MAR) and dissociation (MAD) mech-anisms
                      expected to be strong in typical low-temperature hydrogenic
                      diver-tor plasmas exhibit a kinetic isotope effect. The
                      effect originates from the mass dependence of rate
                      coeffcients of dissociative electron attachment and
                      atomic-to-molecular ion conversion reactions, that are
                      common precursors for MAR and MAD mechanisms. MAR favours a
                      faster recombbination of the lighter ion with plasma
                      electrons, while MAD favours a faster dissociation of the
                      lighter molecule. The effect is cumulative, and during the
                      ion residence time in the divertor it may produce
                      significant differences in the recombined electron-ion pairs
                      of the two isotopes, and in the amounts of dissociation
                      products of the two isotopic molecules. For example a factor
                      of 3 - 9 in MAR, and 22 - 400 in MAD in the concentrations
                      of recombination and dissociation products results, for T =
                      3 eV, n$_{e}$ = 3 $\cdot$ 10$^{14}$ cm$^{-3}$ and
                      [H$_{2}$]:[D$_{2}$]:[HD] in the range 1:1:0 - 1:1:2. Some
                      implications of MAR and MAD isotope effects for divertor
                      plasma physics are discussed.},
      cin          = {IEK-4},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174)},
      pid          = {G:(DE-HGF)POF3-174},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/850290},
}