关键词: 
弱束缚核反应 /
奇A轻核反应 /
弹性散射角分布 /
光学模型势 /
能量相依性

摘要: 实验测量了⁷Li+¹¹B 体系的弹性散射角分布，其中弹核⁷Li 的入射能量分别为9.85，13.3，18.3，23.3 和28.3 MeV，测量的角度范围为θc:m: ≈ 15◦ ∼ 80◦。通过对本次实验数据以及文献中34 MeV 的数据拟合，抽取了该体系的唯象光学势参数。结果表明，在固定作用势形状因子下，势深度与能量具有线性相依的关系：实部深度随着弹核能量的增加而线性减小，而虚部深度则在平均值10.35 MeV 附近变化。Angular distributions of ⁷Li+¹¹B elastic scattering were measured at Elab(⁷Li)=9.85, 13.3, 18.3, 23.3 and 28.3 MeV within the angular range of θc:m: ≈ 15◦ s 80◦. The analyse of these angular distributions together with the data taken from literatures at Elab(⁷Li) = 34 MeV have been performed to extract the parameters of optical model potential. With the fixed geometrical shapes, the potential strengths show a concise relation to the reaction energy: the depths of real potential decrease linearly with energy increasing, whereas the depths of imaginary part just slightly vary around the average value of 10.35 MeV.