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A series of computations based on multichannel quantum defect theory have been performed in order to produce the cross sections of rotational transitions (excitationsto 10) and of their competitive process, the dissociative recombination, induced by collisions of HD + ions with electrons in the energy range 10 −5 to 0.3 eV. Maxwell anisotropic rate coefficients, obtained from these cross sections in the conditions of the Heidelberg Test Storage Ring (TSR) experiments (k B T t = 2.8 meV and k B T l = 45 μeV), have been reported for those processes in the same electronic energy range. Maxwell isotropic rate coefficients have been presented as well for electronic temperatures up to a few hundred Kelvins. Very good overall agreement is found between our results for rotational transitions and the former theoretical computations as well as with experiment. Furthermore, due to the full rotational computations performed, the accuracy of the resulting dissociative recombination cross sections is improved considerably.

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Multichannel quantum defect theory is applied in the treatment of the dissociative recombination and vibrational excitation processes for the BeD + ion in the 24 vibrational levels of its ground electronic state). Three electronic symmetries of BeD ** states ( P 2 , S + 2, and D 2 ) are considered in the calculation of cross sections and the corresponding rate coefficients. The incident electron energy range is 10 −5 -2.7 eV and the electron temperature range is 100-5000K. The vibrational dependence of these collisional processes is highlighted. The resulting data are useful in magnetic confinement fusion edge plasma modeling and spectroscopy, in devices with beryllium based main chamber materials, such as ITER and JET, and operating with the deuteriumtritium fuel mix. An extensive rate coefficients database is presented in graphical form and also by analytic fit functions whose parameters are tabulated in the supplementary material.