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arXiv 1909.03221nucl-exnucl-th
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$^9$ Be + $^{197}$ Au系统中库仑势垒以上的熔合反应

Fusion reactions in the $^9$Be + $^{197}$Au system above the Coulomb barrier

G. S. Li, J. G. Wang, J. Lubian, H. O. Soler, Y. D. Fang, M. L. Liu, N. T. Zhang, X. H. Zhou, Y. H. Zhang, B. S. Gao, Y. H. Qiang, S. Guo, S. C. Wang, K. L. Wan… 展开作者

G. S. Li, J. G. Wang, J. Lubian, H. O. Soler, Y. D. Fang, M. L. Liu, N. T. Zhang, X. H. Zhou, Y. H. Zhang, B. S. Gao, Y. H. Qiang, S. Guo, S. C. Wang, K. L. Wang, K. K. Zheng, R. Li, Y. Zheng

摘要:

首次测量了能量不超过库仑势垒的$ ^{9} $ Be + $ ^{197} $ Au系统的完全熔合和不完全熔合截面。在线激活后,离线$γ$ -射线光谱法用于推导的截面。与文献中报道的使用$ ^{9} $ Be束的其他系统相比,已经观察到稍高的ICF/TF比值。实验数据进行了比较,耦合通道计算不考虑耦合的分裂通道,和其他反应系统的实验数据与弱约束弹丸。当能量高于势垒时,发现$ ^{9} $ Be + $ ^{197} $ Au体系的完全熔合抑制约为40%,而总熔合截面与计算结果一致.

英文摘要:

The cross sections of complete fusion and incomplete fusion for the $ ^{9} $Be + $ ^{197} $Au system, at energies not too much above the Coulomb barrier, were measured for the first time. The online activation followed by offline $γ$-ray spectroscopy method was used for the derivation of the cross sections. A slightly higher value of ICF/TF ratio has been observed, compared to other systems reported in the literature with $ ^{9} $Be beam. The experimental data were compared with coupled channel calculations without taking into account the coupling of the breakup channel, and experimental data of other reaction systems with weakly bound projectiles. A complete fusion suppression of about 40\% was found for the $ ^{9} $Be + $ ^{197} $Au system, at energies above the barrier, whereas the total fusion cross sections are in agreement with the calculations.

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