Excitation functions of the projectile-like fragments in the dissipative reaction F-19+V-51 have been measured from 102.25 MeV to 109.50 MeV in 250 keV steps. The corresponding energy coherence widths Gamma were extracted by means of the energy autocorrelation function method. The dependence of Gamma on the degree of freedom of neutron excess N/Z and the dependence of the charge number Z on the angular momentum coherence width gamma are presented and discussed.