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Shafir D, Novotny S, Buhr H, et al. Rotational cooling of HD+ molecular ions by superelastic collisions with electrons. Phys Rev Lett. 2009;102(22):223202doi: 10.1103/PhysRevLett.102.223202.
Shafir, D., Novotny, S., Buhr, H., Altevogt, S., Faure, A., Grieser, M., Harvey, A. G., Heber, O., Hoffmann, J., Kreckel, H., Lammich, L., Nevo, I., Pedersen, H. B., Rubinstein, H., Schneider, I. F., Schwalm, D., Tennyson, J., Wolf, A., & Zajfman, D. (2009). Rotational cooling of HD+ molecular ions by superelastic collisions with electrons. Physical review letters, 102(22), 223202. https://doi.org/10.1103/PhysRevLett.102.223202
Shafir, D, et al. "Rotational cooling of HD+ molecular ions by superelastic collisions with electrons." Physical review letters vol. 102,22 (2009): 223202. doi: https://doi.org/10.1103/PhysRevLett.102.223202
Shafir D, Novotny S, Buhr H, Altevogt S, Faure A, Grieser M, Harvey AG, Heber O, Hoffmann J, Kreckel H, Lammich L, Nevo I, Pedersen HB, Rubinstein H, Schneider IF, Schwalm D, Tennyson J, Wolf A, Zajfman D. Rotational cooling of HD+ molecular ions by superelastic collisions with electrons. Phys Rev Lett. 2009 Jun 05;102(22):223202. doi: 10.1103/PhysRevLett.102.223202. Epub 2009 Jun 05. PMID: 19658863.
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Phys Rev Lett. 2009 Jun 05;102(22):223202. doi: 10.1103/PhysRevLett.102.223202. Epub 2009 Jun 05.

Rotational cooling of HD+ molecular ions by superelastic collisions with electrons.

Physical review letters

D Shafir, S Novotny, H Buhr, S Altevogt, A Faure, M Grieser, A G Harvey, O Heber, J Hoffmann, H Kreckel, L Lammich, I Nevo, H B Pedersen, H Rubinstein, I F Schneider, D Schwalm, J Tennyson, A Wolf, D Zajfman

Affiliations

  1. Department of Particle Physics, Weizmann Institute of Science, 76100 Rehovot, Israel.

PMID: 19658863 DOI: 10.1103/PhysRevLett.102.223202

Abstract

Merging an HD+ beam with velocity matched electrons in a heavy ion storage ring we observed rapid cooling of the rotational excitations of the HD+ ions by superelastic collisions (SEC) with the electrons. The cooling process is well described using theoretical SEC rate coefficients obtained by combining the molecular R-matrix approach with the adiabatic nuclei rotation approximation. We verify the DeltaJ=-2 SEC rate coefficients, which are predicted to be dominant as opposed to the DeltaJ=-1 rates and to amount to (1-2)x10;{-6} cm;{3} s;{-1} for initial angular momentum states with J< or =7, to within 30%.

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