Asymptotic resonant charge transfer cross section as a function of collision energy in He()-He+ () interaction compared with experimental results30 (close markers).
Asymptotic resonant charge transfer cross section as a function of principal quantum number of excited atomic partners in He⋆(n)-He+ () interaction, at collision energy E = 1 eV, compared with corresponding theoretical results for H⋆(n)-H+ (Ref. 11) (close markers).
Diffusion-type collision integrals for (He+)⋆(n)-He 2+ interactions. Inelastic contributions due to resonant charge exchange for excited states (dotted lines) and elastic contribution (markers).
Reactive thermal conductivity as a function of temperature for LTE helium plasma at p = 1 atm (Ref. 32) in the usual approach (solid line) compared with abnormal values (line with markers) obtained in the assumption of independent equilibria (Eqs. (27) and (28)). The shaded area represents the temperature region where species coexist and the assumption is not fulfilled.
Resonant charge exchange cross sections and parameters for He-He+ collisions, in the frame of asymptotic, , from Eq. (14), and classical, , from Eq. (6), approaches at collision energy E = 1 eV. represents the energy of excited levels with respect to the ground.
Asymptotic resonant charge exchange cross sections, , at different collision energies for -He+ collisions.
Resonant charge exchange cross section in He⋆()-He+ and He⋆()-He+ interactions, in the frame of asymptotic theory, obtained with asymptotic, , and exact, , expression for electron wavefunction. characterizes the sensitivity of results on the parameters.
Averaged values of asymptotic cross sections of resonant charge exchange in He-He collisions, according to Eq. (19).
Resonant charge transfer cross section [10–14 cm2], calculated in asymptotic and classical approaches, for ion-parent-atom interactions involving excited helium atoms, with principal quantum number n = 2–5.
Inelastic contribution to diffusion-type collision integrals, due to resonant charge transfer, for He⋆(n)-He+ interactions, with principal quantum number n.
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