angular overlap
4.for Eu3+ ions in LaOX (X = Cl,Br,I) crystals for which the approximative point group symmetry is C4, have been calculated for the first time by making use of Angular Overlap Model(AOM). And the energy levels were fitted. The angulap overlar parameters obtained are listed in Table 2. From this we can see that the values of parameter e?
5.Using the improved method of parametrization of EFR-DWBA overlap integral, We calculate the double diffirential energy spectra and angular distributions of α-particles for the reactions ~(209)Bi (~(12)C,α) ~(217)Fr and extracte the preformation probability of α-particle at the surface of ~(217)Fr nuclei from fitting the experimental data.

