Vibrational energy transfer in ultracold molecule - molecule collisions

Details Vibrational energy transfer in ultracold molecule - molecule collisions Vibrational energy transfer in ultracold molecule - molecule collisions

2007-09-19

arxiv.org/abs/0709.3081v2

Phys. Rev. A 77, 030704(R) (2008)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.77.030704

We present a rigorous study of vibrational relaxation in p-H2 + p-H2 collisions at cold and ultracold temperatures and identify an efficient mechanism of ro-vibrational energy transfer. If the colliding molecules are in different rotational and vibrational levels, the internal energy may be transferred between the molecules through an extremely state-selective process involving simultaneous conservation of internal energy and total rotational angular momentum. The same transition in collisions of distinguishable molecules corresponds to the rotational energy transfer from one vibrational state of the colliding molecules to another.

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