Evaporative Cooling of Helium Nanodroplets with Angular Momentum Conservation

Details Evaporative Cooling of Helium Nanodroplets with Angular Momentum Conservation Evaporative Cooling of Helium Nanodroplets with Angular Momentum Conservation

2003-12-07

arxiv.org/abs/physics/0312041v1

Physics

Chemical Physics

4 pages including 2 figures. As submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.92.173401

Evaporative cooling of helium nanodroplets is studied with a statistical rate model that includes, for the first time, angular momentum conservation as a constraint on the accessible droplet states. It is found that while the final temperature of the droplets is almost identical to that previously predicted and later observed, the distribution of total droplet energy and angular momentum states is vastly more excited than a canonical distribution at the same temperature. It is found that the final angular momentum of the droplets is highly correlated with the initial direction, and that a significant fraction of the alignment of the total angular momentum should be transferred to the rotational angular momentum of an embedded molecule.

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