Extraction of nuclear imaginary potential from the excitation function of backward quasi-elastic scattering

• Published in: Chinese physics C Vol. 49; no. 6; p. 64111
• Main Authors: 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, Huang 黄, Zhi-jie 志杰, Wang 王, Hao-rui 浩睿, Fan 范, Ze-rui 泽睿, Fu 傅, Ling-yi 凌逸
• Format: Journal Article
• Language: English
• Published: 01.06.2025
• ISSN: 1674-1137; 2058-6132
• DOI: 10.1088/1674-1137/adbd18

The nuclear potential is a cornerstone in the study of nuclear structures and reactions. Research on the real part of nuclear potential has been well described using various models; however, that on the imaginary part of nuclear potential remains insufficient. This study proposes a novel method to extract the imaginary nuclear potential from the high-precision excitation function of backward quasi-elastic scattering. The typical systems O Sm, W with deformed target nuclei were analyzed. Nuclear imaginary potentials were obtained successfully by fitting the excitation functions within the single-channel and coupled-channel frameworks, respectively. A good reproduction at the energy range between sub- and above-barrier energy regions was achieved. Results show long-range imaginary-part potential at a wide energy region covering the Coulomb barrier, consistent with the strong absorption for well-deformed systems. This work is a preliminary attempt to bridge the gap between fusion and scattering and extract the deformation parameters in the whole energy range. The subsequent systematic analysis needs to be further improved.