The Angular Dependence of the Coherence Energy in Dissipative Reaction of 19F+51V

Excitation functions for projectile-like fragments from 19F+51V dissipative reaction were measured at angles equal to 21.7��, 36.1�� and 40.5�� within the energy range 102.25-109.50 MeV in steps of 250 keV (in lab), where 19F8+ beams were extracted from the HI-13 Tandem Accelerator at CLAE, Beijing, China. Coherence energy was extracted by generalized statistical fluctuation analysis. The dependence on charge number and on N/Z values were obtained. The rotation of intermediate dinuclear system results in the angular dependence of coherence energy. The angular velocity damping is attributed to the relative angular momentum dissipation in the reaction.