Molecular vibration in cold collision theory

Details Molecular vibration in cold collision theory Molecular vibration in cold collision theory

2002-02-13

arxiv.org/abs/quant-ph/0202075v1

Physics

Quantum Physics

11 pages, 3 figures

Scientific paper

10.1103/PhysRevA.65.064702

Cold collisions of ground state oxygen molecules with Helium have been investigated in a wide range of cold collision energies (from 1 $\mu$K up to 10 K) treating the oxygen molecule first as a rigid rotor and then introducing the vibrational degree of freedom. The comparison between the two models shows that at low energies the rigid rotor approximation is very accurate and able to describe all the dynamical features of the system. The comparison between the two models has also been extended to cases where the interaction potential He - O$_2$ is made artificially stronger. In this case vibration can perturb rate constants, but fine-tuning the rigid rotor potential can alleviate the discrepancies between the two models.

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