$^8$He 偶极强度分布与衰变特性
核实验
2026-04-06 v2 核理论
摘要
脱离线核的弱束缚和空间扩展中子密度特征导致独特的低能偶极响应。He 是最中子富集的束缚核，质量-电荷比为 。我们测量了 He 的偶极响应，首次包括四中子衰变通道。从微分库仑激发横截面中提取总偶极强度 ~MeVfm 和偶极极化率 ~fm，并与采用耦合簇和三体方法的先进理论计算进行比较。我们发现，即使在4n衰变阈值以上较高激发能，偶极连续体仍由两中子发射主导，指向 He+2n4nnn^6n$ 最终态关联。
引用
@article{arxiv.2603.24341,
title = {The dipole strength distribution of $^8$He and decay characteristics},
author = {C. Lehr and T. Aumann and M. Duer and A. T. Saito and T. Nakamura and N. L. Achouri and D. Ahn and H. Baba and S. Bacca and C. A. Bertulani and M. Böhmer and F. Bonaiti and K. Boretzky and C. Caesar and N. Chiga and D. Cortina-Gil and C. A. Douma and F. Dufter and Z. Elekes and J. Feng and B. Fernández-Domínguez and U. Forsberg and N. Fukuda and I. Gasparic and Z. Ge and R. Gernhäuser and J. M. Gheller and J. Gibelin and A. Gillibert and K. I. Hahn and Z. Halász and M. N. Harakeh and A. Hirayama and M. Holl and N. Inabe and T. Isobe and J. Kahlbow and N. Kalantar-Nayestanaki and D. Kim and S. Kim and T. Kobayashi and Y. Kondo and D. Körper and P. Koseoglou and Y. Kubota and P. J. Li and S. Lindberg and Y. Liu and F. M. Marqués and S. Masuoka and M. Matsumoto and J. Mayer and K. Miki and M. Miwa and B. Monteagudo and A. Obertelli and N. A. Orr and H. Otsu and V. Panin and S. Y. Park and M. Parlog and S. Paschalis and P. M. Potlog and S. Reichert and A. Revel and D. M. Rossi and R. Roth and M. Sasano and H. Scheit and F. Schindler and T. Shimada and S. Shimoura and H. Simon and S. Storck Dutine and L. Stuhl and H. Suzuki and D. Symochko and H. Takeda and S. Takeuchi and J. Tanaka and Y. Togano and T. Tomai and H. T. Törnqvist and J. Tscheuschner and T. Uesaka and V. Wagner and H. Yamada and B. Yang and L. Yang and Z. H. Yang and M. Yasuda and K. Yoneda and L. Zanetti and J. Zenihiro},
journal= {arXiv preprint arXiv:2603.24341},
year = {2026}
}