A SIMPLE METHOD FOR BACKGROUND DETERMINATION IN SMALL-ANGLE SCATTERING EXPERIMENTS

The coherent signal of Small Angle Scattering superimposes to a flat b ackground, which is given by incoherent scattering, by electronic nois e and, sometimes, by radiation background around the instrument. In or der to analyze the experimental data, the background level has to be t aken into account and quite often theoretical estimations do not give values comparable to the experimental evidences. In this paper it is s hown a new representation which allows in a simple way the background level determination; in particular, in a convenient plot, the experime ntal data are fitted by a straight line passing through the origin, th e slope of which is equal to the fourth root of the background.