$^6$ Li+ $^{58,64}$ Ni和$^{16}$ O+ $^{58,64}$ Ni光学模型势灵敏半径的比较研究
Comparative study of the radius of sensitivity of the optical model potentials for $^6$Li+$^{58,64}$Ni and $^{16}$O+$^{58,64}$Ni
摘要：
对$^{6}$ Li+ $^{58,64}$ Ni体系在库仑势垒附近的灵敏度半径进行了估算。为了比较的目的，还对从相同靶同位素散射的稳定的$^{16}$ O估计了这样的半径。用DDM 3 Y核子-核子相互作用产生的折叠实势和体积Woods-Saxon形式的虚势对弹性散射数据进行了分析。$^{16}$ O+ $^{58,64}$ Ni体系的最灵敏半径与能量无关，接近强吸收半径。对于$^{6}$ Li射弹，与强束缚射弹不同，穿越半径随能量减小而增大。然而，对于$^{6}$ Li+ $^{58,64}$ Ni和$^{16}$ O+ $^{58,64}$ Ni体系，在势垒顶部没有观察到两个交叉情况。
英文摘要：
Radii of sensitivity were estimated for the $^{6}$Li+$^{58,64}$Ni system at energies near the Coulomb barrier. For comparison purposes, such radii were also estimated for stable $^{16}$O scattered from same target isotopes. The elastic scattering data were analysed with folded real potential generated from DDM3Y nucleon-nucleon interaction and an imaginary potential of volume Woods-Saxon form. The most sensitive radii for $^{16}$O+$^{58,64}$Ni system are found to be energy independent and close to the strong absorption radius. For $^{6}$Li projectile, unlike its strongly bound counterpart, the crossing radius increases with decreasing energy. However, no two crossing situation has been observed for both $^{6}$Li+$^{58,64}$Ni and $^{16}$O+$^{58,64}$Ni systems at the top of the barrier.
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