An attempt was made to understand the role of various entrance channel parameters on incomplete fusion dynamics by the measurements of excitation functions of evaporation residues populated via complete and incomplete fusion dynamics in the system ¹⁹F + ¹⁵⁴Sm at projectile energy ≈ 4-6 MeV/A. The stacked foil activation technique followed by offline gamma ray spectrometry was employed in these measurements. The measured excitation functions of various evaporation residues populated have been analyzed within the framework of statistical model code PACE-4. It has been observed that the measured excitation functions of xn and pxn emission channels agree well with the theoretical predictions of PACE-4. On the other hand, the measured excitation functions of α-emission channels have been found significantly enhanced over their theoretical predictions. This enhancement may be attributed to the incomplete fusion of the projectile ¹⁹F as the calculations for incomplete fusion are not included in statistical model calculations. The incomplete fusion fraction has been deduced from the present measurements. Further, a systematic study has also been performed, which shows that the incomplete fusion increases significantly with entrance channel mass asymmetry at low projectile energy, differently for different projectiles.

中文翻译：

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19F + 154Sm系统中弹丸破裂的影响

试图通过测量通过¹⁹ F + ¹⁵⁴系统中的完全和不完全融合动力学填充的蒸发残留物的激发函数来了解各种入口通道参数对不完全融合动力学的作用。弹丸能量下的Sm≈4-6 MeV / A。在这些测量中，采用了叠层箔活化技术，然后采用离线伽马射线光谱法。已在统计模型代码PACE-4的框架内分析了所填充的各种蒸发残留物的测量激发函数。已经观察到，测量的xn和pxn发射通道的激发函数与PACE-4的理论预测非常吻合。另一方面，已发现测得的α发射通道的激发函数比其理论预测显着增强。这种增强可归因于射弹¹⁹的不完全融合F作为不完全融合的计算不包括在统计模型计算中。从当前的测量结果推导出不完全的融合分数。此外，还进行了系统的研究，结果表明，在低射弹能量下，不完全融合会随着入口通道质量的不对称性而显着增加，对于不同的射弹而言，情况则有所不同。