  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.
