Observing the Ping-pong Modality of Isospin Degree of Freedom in Cluster Emission from Heavy Ion Reactions

• Published in: arXiv.org 2022-09
• Main Authors: Wang, Yijie, Guan, Fenhai, Diao, Xinyue, Wan, Mengting, Qin, Yuhao, Qin, Zhi, Wu, Qianghua, Guo, Dong, Si, Dawei, Xiao, Sheng, Zhang, Boyuan, Zhang, Yaopeng, Tian, Baiting, Xianglun Wei, Yang, Herun, Ma, Peng, Hu, Rongjiang, Duan, Limin, Duan, Fangfang, Hu, Qiang, Ma, Junbing, Xu, Shiwei, Bai, Zhen, Yang, Yanyun, Wang, Jiansong, Liu, Wenbo, Su, Wanqing, Xiaobao Wei, Chun-Wang, Ma, Li, Xinxiang, Wang, Hongwei, Wang, Fangyuan, Zhang, Yingxun, Warda, Michał, Dobrowolski, Arthur, Nerlo-Pomorska, Bożena, Pomorski, Krzysztof, Ou, Li, Xiao, Zhigang
• Format: Article
• Language: English
• Subjects: Clusters; Commonality; Emission; Heavy ions; Nuclear isobars; Spectral emittance
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2209.04079

Two-body correlations of the isotope-resolved light and heavy clusters are measured in \(^{86}\)Kr+\(^{\rm 208}\)Pb reactions at 25 MeV/u. The yield and kinetic variables of the \(A=3\) isobars, triton and \(^3\)He, are analyzed in coincidence with the heavy clusters of \(7\le A \le 14\) emitted at the earlier chance. While the velocity spectra of both triton and \(^3\)He exhibit scaling behavior over the type of the heavy clusters, the yield ratios of \({\rm t/^3He}\) correlate reversely to the neutron-to-proton ratio \(N/Z\) of the latter, showing the ping-pong modality of the \(N/Z\) of emitted clusters. The commonality that the \(N/Z\) of the residues keeps the initial system value is extended to the cluster emission in heavy ion reactions. The comparison of transport model calculations to the data is discussed.