Sensitivity of the dynamics of Na + Na2 collisions on the three-body interaction at ultralow energies
PALMS, UMR 6627 du CNRS, Université de Rennes 1, Campus de
Beaulieu, 35042 Rennes Cedex, France
Corresponding author: a Pascal.Honvault@univ-rennes1.fr
Published online: 22 June 2004
We have studied the quantum dynamics of collisions between spin-stretched Na atoms and Na2 molecules. Cross-sections and rate coefficients for vibrational relaxation of Na2(v,j=0) have been computed in the 1 nK-0.1 mK energy range using an accurate time-independent method based on hyperspherical coordinates. The complex scattering length and the extension of the Wigner region have been determined. A detailed study of the sensitivity of collisional quantities on the three-body interaction at short distance has been performed. They are very sensitive to three-body effects for the vibrational state v=1 of Na2. Rotational distributions have also been calculated and show a more pronounced sensitivity on the three-body interaction, even for v=2 and 3.
PACS: 34.50.-s – Scattering of atoms and molecules
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004