深垒下能区 12C+28Si 的融合反应
核实验
2025-09-29 v1
摘要
在轻的重离子系统中，融合阻碍的存在尚未得到充分证实。研究稍重的系统可以将趋势外推到天体物理感兴趣的轻系统。利用来自 LNL 的 XTU 串列加速器提供的 28Si 束流轰击薄 12C 靶，已将 12C + 28Si 的融合反应测量至深垒下能区。融合蒸发余核由静电束流分离器后的探测器望远镜探测，并进行了伽马射线阵列 AGATA 与分段硅探测器 DSSD 之间的符合测量，其中蒸发的轻带电粒子通过脉冲形状分析进行识别。在 150 mb-42 nb 的宽范围内获得了融合截面。使用伍兹-萨克森势的耦合道（CC）计算重现了 0.1 mb 以上的数据。低于该值，融合阻碍显现，CC 计算结果高估了截面，这些截面接近一维势垒隧穿极限。这表明耦合强度逐渐消失，正如绝热模型所预测的那样。融合阻碍阈值遵循最近更新的唯象系统学。
引用
@article{arxiv.2509.22349,
title = {Fusion of 12C+28Si at deep sub-barrier energies},
author = {A. M. Stefanini and G. Montagnoli and M. Del Fabbro and A. Goasduff and P. A. Aguilera Jorquera and G. Andreetta and F. Angelini and L. V. DAuria and M. Balogh and D. Bazzacco and J. Benito and G. Benzoni and M. A. Bentley and N. Bez and A. Bonhomme and S. Bottoni and A. Bracco and D. Brugnara and L. Busak and S. Capra and S. Carollo and S. Casans and E. Clement and P. Cocconi and A. Cogo and G. Colucci and A. Conte and E. Coradin and L. Corradi and S. Courtin and G. DeAngelis and J. M. Deltoro and G. Del Piero and R. Depalo and J. Dudouet and A. Ertoprak and E. Fioretto and A. Gadea and F. Galtarossa and A. Gambalonga and A. Giaz and B. Gongora Servin and V. Gonzalez and A. Gottardo and A. Gozzelino and G. Harmant and M. Heine and I. Kuti and M. Labiche and S. Lenzi and S. Leoni and M. Mazzocco and R. Menegazzo and D. Mengoni and T. Mijatovic and B. Million and E. Monpribat and A. Nannini and D. R. Napoli and A. E. Navarro-Anton and R. Nicolas del Alamo and J. Nyberg and S. Paschalis and J. Pellumaj and R. M. Perez-Vidal and M. Petri and E. Pilotto and S. Pigliapoco and Zs. Podolyak and M. Polettini and A. Pullia and L. Ramina and M. Rampazzo and W. Raniero and M. Rebeschini and F. Recchia and P. Reiter and K. Rezynkina and M. Rocchini and D. Rosso and E. Sanchis and M. Scarcioffolo and D. Scarpa and M. Senyigit and J. Simpson and D. Sohler and O. Stezowski and D. Stramaccioni and S. Szilner and Ch. Theisen and N. Toniolo and A. Trzcinska and J. J. Valiente Dobon and F. Veronese and Jelena Vesic and V. Volpe and K. Wimmer and L. Zago and I. Zanon and M. Zielinska},
journal= {arXiv preprint arXiv:2509.22349},
year = {2025}
}