Rayleigh scattering from argon clusters in a planar expansion

Abstract

Rayleigh scattering is presented as evidence for the presence of large argon clusters formed in a planar expansion. Based on the observed scattering signal, the dependence of mean cluster size on stagnation pressure is 〈N〉 P0 3.38. This is in contrast to the dependence of the mean cluster size on stagnation pressure for a symmetric expansion of 〈N〉 P0 2.29. © 2008 American Institute of Physics.