摘要
本文利用CR-39固体核径迹探测器对400 A MeV能区范围内的^(12)C、^(40)Ar、^(56)Fe、^(84)Kr射弹分别作用于Al、 C、 CH_(2)靶的电荷拾取反应截面进行了实验研究,探索在400 A MeV能区重离子电荷拾取反应截面与射弹核大小的依赖关系,为此能区的电荷拾取反应机制研究提供实验依据。通过分别利用幂函数和线性函数关系式拟合电荷拾取反应截面与射弹核质量的数据关系,发现幂函数的幂次拟合参数b在-0.01~0.71之间,这种对于射弹核质量A_(P)的依赖关系,与在更高束流能量更重射弹核观察到的结果不同;线性函数的斜率拟合参数β在-0.004~0.24之间,此结果在一定程度上证实电荷拾取反应过程应为边缘及表面反应过程的集体贡献。
This study experimentally investigates the charge pickup reaction cross-sections of ^(12)C,^(40)Ar,^(56)Fe,and ^(84)Kr projectiles incident on Al,C,and CH_(2) targets at around 400 A MeV,using CR-39 solid-state nuclear track detectors.The aim is to explore the dependence of the charge pickup reaction cross-section on the projectile size in the 400 A MeV region and provides experimental evidence for the reaction mechanism in this energy range.The data on the relationship between the charge pickup reaction cross-section and the projectile mass were fitted using both power-law and linear functions.The power-law exponent parameter b was found to range from−0.01 to 0.71,indicating a dependence on the projectile mass A_(P) that differs from observations at higher beam energies with heavier projectiles.The slope parameter β of the linear fit ranged from−0.004 to 0.24.These results partially support the idea that the charge pickup reaction process involves collective contributions from peripheral and surface interactions.
作者
李蓉
张东海
LI Rong;ZHANG Donghai(School of Physics and Electronic Engineering,Shanxi Normal University,Taiyuan 030031,China)
出处
《中北大学学报(自然科学版)》
2025年第6期800-807,共8页
Journal of North University of China(Natural Science Edition)
基金
山西省青年科技研究基金资助项目(202203021212396)。
关键词
中高能核-核碰撞
电荷拾取反应截面
CR-39核径迹探测器
intermediate and high energy nucleus-nucleus collisions
charge-pickup reaction cross-sections
CR-39 nuclear track detector
