GLORY STRUCTURE IN THE N-2-N-2 TOTAL INTEGRAL SCATTERING CROSS-SECTION - A TEST FOR THE INTERMOLECULAR POTENTIAL-ENERGY SURFACE

The first measurement of the glory structure of the total integral cro ss section for the scattering of N-2 against N-2 is reported for the c ollision velocity range 500-3000 m s(-1). A comparison is made between the measured structure and calculations carried out within the infini te-order sudden dynamical approximation using a previously proposed N- 2-N-2 interaction potential [J. Chem. Phys. 84 (1986) 1629]. Reasonabl e agreement is found between the measured and calculated glory structu re. There are, however, small but meaningful differences between the t wo results, indicating that the negative area of the interaction poten tial should be increased slightly.