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 anisotr opic features. Quantum scattering calculations of the rotational inelastic de-excitation cross sections are carried out using a recently proposed multichan nel treatment, the modified variable phase method, implemented by the authors and applied here to ultralow collision energies. General conclusions on the l ow efficiency of a He buffer gas in cooling down molecular rotations in this system are presented and analyzed.
Rotational cooling of Li-2((1)Sigma(+)(g)) molecules by ultracold collisions with a helium gas buffer / Bodo, Enrico; Gianturco, Francesco Antonio; Sebastianelli, Francesco; Yurtsever, E; Yurtsever, M.. - In: THEORETICAL CHEMISTRY ACCOUNTS. - ISSN 1432-881X. - STAMPA. - 112:(2004), pp. 263-269. [10.1007/s00214-004-0586-z]
Rotational cooling of Li-2((1)Sigma(+)(g)) molecules by ultracold collisions with a helium gas buffer
BODO, Enrico;GIANTURCO, Francesco Antonio;SEBASTIANELLI, Francesco;
2004
Abstract
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 anisotr opic features. Quantum scattering calculations of the rotational inelastic de-excitation cross sections are carried out using a recently proposed multichan nel treatment, the modified variable phase method, implemented by the authors and applied here to ultralow collision energies. General conclusions on the l ow efficiency of a He buffer gas in cooling down molecular rotations in this system are presented and analyzed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
