270 MeV/u 中心 Sn+Sn 碰撞中的同位旋标度
核实验
2022-11-08 v1 核理论
摘要
关于碎片发射的实验信息对于理解核碰撞动力学以及发展模拟重离子碰撞的输运模型十分重要。重离子碰撞中发射的复杂碎片组成可用统计模型解释，这些模型假设在低于 100 MeV/u 的碰撞能量下达到了热平衡。我们来自 270 MeV/u 的 Sn+Sn 碰撞的新实验数据以及对轻粒子的理论分析表明，对于以高转移动量发射的粒子，热平衡假设失效。为检验此种极限下系统的性质，在统计多重碎裂模型和反对易分子动力学模型的框架下，考察了来自两个系统的粒子产额比的标度特征：一个富中子系统 和一个近似对称系统 。来自低能粒子的同位旋标度与两个模型均相符。然而，观测到的高横向动量粒子的同位旋标度失效无法由反对易分子动力学模型解释。
引用
@article{arxiv.2211.02837,
title = {Isoscaling in central Sn+Sn collisions at 270 MeV/u},
author = {J. W. Lee and M. B. Tsang and C. Y. Tsang and R. Wang and J. Barney and J. Estee and T. Isobe and M. Kaneko and M. Kurata-Nishimura and W. G. Lynch and T. Murakami and A. Ono and S. R. Souza and D. S. Ahn and L. Atar and T. Aumann and H. Baba and K. Boretzky and J. Brzychczyk and G. Cerizza and N. Chiga and N. Fukuda and I. Gasparic and B. Hong and A. Horvat and K. Ieki and N. Ikeno and N. Inabe and G. Jhang and Y. J. Kim and T. Kobayashi and Y. Kondo and P. Lasko and H. S. Lee and Y. Leifels and J. Łukasik and J. Manfredi and A. B. McIntosh and P. Morfouace and T. Nakamura and N. Nakatsuka and S. Nishimura and H. Otsu and P. Pawłowski and K. Pelczar and D. Rossi and H. Sakurai and C. Santamaria and H. Sato and H. Scheit and R. Shane and Y. Shimizu and H. Simon and A. Snoch and A. Sochocka and T. Sumikama and H. Suzuki and D. Suzuki and H. Takeda and S. Tangwancharoen and Y. Togano and Z. G. Xiao and S. J. Yennello and Y. Zhang},
journal= {arXiv preprint arXiv:2211.02837},
year = {2022}
}