Systematic extraction of the strong absorption distance and Coulomb barrier from elastic scattering

【摘要】 The reduced strong absorption distance d_S and Coulomb barrier height V_B are extracted from the quarter-point recipe from a series of experimental elastic scattering angle distributions. The nuclei with different binding energies are systematically studied as the projectile, including the tightly bound, weakly bound, and halo nuclei. It is found that the mean d_S for halo nuclei is significantly larger than that of tightly and weakly bound nuclei. The complex behavior of d_S regarding the binding energy and properties of the target is observed for halo nuclei.The linear relationship of the reduced distance with system size may be used to estimate the Coulomb barrier radius R_B, which is difficult to obtain from fusion reactions. The rule of V_B concerning the Coulomb parameter z is in agreement with other theoretical barrier laws extracted from the fusion reaction. Furthermore, the reason why the binding energy or deformation has little effect on the linear relationship of V_B as a function of z is clarified.更多还原

【Abstract】 The reduced strong absorption distance d_S and Coulomb barrier height V_B are extracted from the quarter-point recipe from a series of experimental elastic scattering angle distributions. The nuclei with different binding energies are systematically studied as the projectile, including the tightly bound, weakly bound, and halo nuclei. It is found that the mean d_S for halo nuclei is significantly larger than that of tightly and weakly bound nuclei. The complex behavior of d_S regarding the binding energy and properties of the target is observed for halo nuclei.The linear relationship of the reduced distance with system size may be used to estimate the Coulomb barrier radius R_B, which is difficult to obtain from fusion reactions. The rule of V_B concerning the Coulomb parameter z is in agreement with other theoretical barrier laws extracted from the fusion reaction. Furthermore, the reason why the binding energy or deformation has little effect on the linear relationship of V_B as a function of z is clarified.更多还原