Anisotropic fragmentation in low-energy dissociative recombination

Details Anisotropic fragmentation in low-energy dissociative recombination Anisotropic fragmentation in low-energy dissociative recombination

2008-10-02

arxiv.org/abs/0810.0417v1

J. Phys.: Conf. Ser. 192 (2009) 012024

Physics

Atomic Physics

8 pages, 4 figures; The Article will be published in the proceedings of DR 2007, a symposium on Dissociative Recombination hel

Scientific paper

10.1088/1742-6596/192/1/012024

On a dense energy grid reaching up to 75 meV electron collision energy the fragmentation angle and the kinetic energy release of neutral dissociative recombination fragments have been studied in a twin merged beam experiment. The anisotropy described by Legendre polynomials and the extracted rotational state contributions were found to vary on a likewise narrow energy scale as the rotationally averaged rate coefficient. For the first time angular dependences higher than 2$^{nd}$ order could be deduced. Moreover, a slight anisotropy at zero collision energy was observed which is caused by the flattened velocity distribution of the electron beam.

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