Messung der Glorienstreuung des totalen Streuquerschnitts von Na-Hg

The velocity dependence of the total cross section of Na-Hg has been measured in the velocity region from 750 to 2700 m/s. The extremaN=5.0 toN=11.0 are well resolved. The glory extrema indexing was performed by counting the number of measured rainbow extrema in the differential cross section at corresponding velocities. The results from the data evaluation method proposed by Bernstein and O'Brien are compared with the results from an inversion procedure for this system. Significant errors can result from the use of the Bernstein-O'Brien method except in the case of the expressiona ₁?r _m .