Rotational cooling of HD+ molecular ions by superelastic collisions with electrons.
Phys Rev Lett
; 102(22): 223202, 2009 Jun 05.
Article
em En
| MEDLINE
| ID: mdl-19658863
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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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article