M. Giglio et al., Space intensity correlations in the near field of the scattered light: A direct measurement of the density correlation function g(r), PHYS REV L, 85(7), 2000, pp. 1416-1419
We show that the two point intensity correlation in the near field of the s
cattered light is directly related to the two point density correlation g(r
). Preliminary measurements on two sets of calibrated random pinholes of 14
0 and 300 mu m diameters, and on aqueous solutions of latex spheres of 5, 1
0, and 40 mu m are reported. A discussion on the desirability of the techni
que as a simple and powerful alternative to low angle scattering will be pr
esented.