The elastic scattering in the reaction \(^{7}\)Li+\(^{208}\)Pb was investigated in the bombarding energy range from 25 to 39 MeV. The real and imaginary parts of the optical potential were analyzed by using a phenomenological potential. A dispersion relation analysis is presented in order to investigate the threshold anomaly effect. It is concluded that \(^{7}\)Li has an intermediate behavior between the tightly bound nuclei such as \(^{16}\)O and the loosely bound nuclei such as \(^{6}\)Li where the lack of the threshold anomaly is unambiguously observed. Reaction cross sections are also extracted from the elastic scattering data and its comparison with the ones of other systems has been performed to draw hints on the effect of the breakup channel.

在轰击能范围为25到39 MeV的情况下，研究了反应\（^ {7} \） Li + \（^ {208} \） Pb中的弹性散射。通过使用现象学电位来分析光学势的实部和虚部。为了研究阈值异常效应，提出了色散关系分析。结论是\（^ {7} \） Li在紧密结合的原子核（例如\（^ {16} \） O）和松散结合的原子核例如\（^ {6} \）之间具有中间行为清楚地观察到缺乏阈值异常的情况。还从弹性散射数据中提取了反应截面，并进行了与其他系统的比较，以得出关于分解通道影响的提示。