The total charge-changing cross-sections and the partial cross-sections for projectile fragments (PFs) production for the fragmentation of ¹²C on C, Al, Cu, Pb and CH₂ targets at the highest energy of 290AMeV were studied. It was found that the total charge-changing reaction cross-sections and the partial reaction cross-sections of PFs production were independent of the beam energy, and increased with increase of mass of target for the same beam energy. The total charge-changing reaction cross-section was the same as the prediction of Bradt–Peters semi-empirical formula, PHITS and NUCFRG2 simulation models. The partial cross-section of PFs production increased with the increase of the mass of target, and it was the same as the prediction of NUCFRG2 models. The mean scattering angle of projectile particle was smaller than the average emission angle of PF, and the width of scattering angle distribution of projectile particle was smaller than that of emission angle distribution of PFs. The mean emission angle of PFs does not obviously depend on the target mass and beam energy in our studied beam energy regions.

中文翻译：

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290AMeV 元素靶上的碳碎裂

¹² C 在 C、Al、Cu、Pb 和 CH ₂目标上以 290 的最高能量裂解的总电荷变化截面和射弹碎片 (PFs) 产生的部分截面一种研究了 MeV。结果表明，PFs产生的总电荷变化反应截面和部分反应截面与束流能量无关，在束流能量相同的情况下，随着靶质量的增加而增加。总电荷变化反应截面与 Bradt-Peters 半经验公式、PHITS 和 NUCFRG2 模拟模型的预测相同。PFs产生的部分截面随着目标质量的增加而增加，与NUCFRG2模型的预测一致。弹丸粒子的平均散射角小于PF的平均发射角，弹丸粒子的散射角分布宽度小于PF的发射角分布宽度。