Angular and velocity distribution of nano-size cluster beams in a gas flow

The present work analyzes the cluster relaxation in the gas beam for clusters formed in a gas aggregation nanocluster sources in the framework of the small transition region model. The model applied provides plausible values for cluster velocities which are in a good agreement with measured ones and in the fair agreement with simulated by other researchers. The effect of separation of clusters of different masses in the beam due to dependence of their transversal velocity on the cluster mass is also studied.