Extraction of nuclear imaginary potential from the excitation function of backward quasi-elastic scattering - Li 李, Hui-yan 慧艳; Lin 林, Cheng-jian 承键; Yang 杨, Lei 磊; Jia 贾, Hui-ming 会明; Wen 温, Pei-wei 培威; Ma 马, Nan-ru 南茹; Yang 杨, Feng 峰; Luo 骆, Tian-Peng 天鹏; Chang 常, Chang 昶; Duan 段, Hai-rui 海锐; Zhu 祝, Song-xian 颂娴; Yin 尹, Cheng 诚; et al. (Chinese physics C, 2025)