Rotational cooling of Li-2((1)Sigma(+)(g)) molecules by ultracold collisions with a helium gas buffer

Bodo E., GIANTURCO F., SEBASTIANELLI F., Yurtsever E., Yurtsever M.

THEORETICAL CHEMISTRY ACCOUNTS, vol.112, no.4, pp.263-269, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 112 Issue: 4
  • Publication Date: 2004
  • Doi Number: 10.1007/s00214-004-0586-z
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.263-269
  • Istanbul Technical University Affiliated: No


The very weak interaction of Li-2 with He atoms has been obtained from accurate ab initio calculations and is here analyzed in terms of its anisotropic features. Quantum scattering calculations of the rotational inelastic de-excitation cross sections are carried out using a recently proposed multichannel treatment, the modified variable phase method, implemented by the authors and applied here to ultralow collision energies. General conclusions on the low efficiency of a He buffer gas in cooling down molecular rotations in this system are presented and analyzed.