Temperatures of rotating clusters

The effect of the spatial anisotropy in the distribution of components of particle momenta of the rotating Ar₃ cluster is studied at a given total energy and different values of the total angular momentum. The Schwarzschild formula applied to describe this distribution gives three parameters which can serve as a measure of the internal temperatures of the cluster. A new definition of the energy of the overall non-rigid rotation based on the Schwarzschild distribution is proposed.