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Anisotropy and molecular rotation in resonant low-energy dissociative recombination
S Novotny1, H Rubinstein, H Buhr
1Max-Planck-Institut für Kernphysik, Heidelberg, Germany.
Abstract:
Angular fragment distributions from the dissociative recombination (DR) of HD(+) were measured with well directed monochromatic low-energy electrons over a dense grid of collision energies from 7 to 35 meV, where pronounced rovibrational Feshbach resonances occur. Significant higher-order anisotropies are found in the distributions, whose size varies along energy in a partial correlation with the relative DR rate from fast-rotating molecules. This may indicate a breakdown of the nonrotation assumption so far applied to predict angular DR fragment distributions.
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