Deuterium enhancement in H3+ in pre-stellar cores.

  title={Deuterium enhancement in H3+ in pre-stellar cores.},
  author={Charlotte Vastel and Thomas G. Phillips and Paola Caselli and Cecilia Ceccarelli and Laurent Pagani},
  journal={Philosophical transactions. Series A, Mathematical, physical, and engineering sciences},
  volume={364 1848},
Deuterium enhancement of monodeuterated species has been recognized for more than 30 years as a result of chemical fractionation that results from the difference in zero-point energies of deuterated and hydrogenated molecules. The key reaction is the deuteron exchange in the reaction between HD, the reservoir of deuterium in dark interstellar clouds, and the H3+ molecular ion, leading to the production of H2D+ molecule, and the low temperature in dark interstellar clouds favours this production… CONTINUE READING

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