A multi-nucleon transfer and cluster decay experiment, Li( B, C + Be) , is conducted at an incident beam energy of 55 MeV. This reaction channel has a significantly large Q-value, which favors populating the high lying resonant states in C. The decay paths, from these resonances to various states of the final nucleus Be, can be selected, owing to the experimentally achieved optimal resolution of the Q-value spectrum. A number of resonant states are reconstructed from the forward emitting Be + fragments, and their major molecular structures can be detected according to the selective decay paths and relative decay widths. A state at 22.4(2) MeV validates the previously measured and theoretically predicted band head of the positive-parity -bond linear-chain molecular band. Two additional resonances at 22.9(2) and 24.2(2) MeV are identified and consistent with the predicted and members of the same molecular band, thus providing novel evidences for the existence of the exotic clustering chain structure in neutron-rich carbon isotopes. A few high energy resonances, which also indicate the presence of the -bond molecular structure, are observed; however, further studies are still required to clarify their ascription in band systematics.

多核子转移和簇衰变实验Li( B, C + Be)在入射束能量为 55 MeV 下进行。该反应通道具有非常大的Q值，有利于填充 C 中的高位共振态。由于实验获得了最佳分辨率，因此可以选择从这些共振到最终核Be 的各种状态的衰减路径。的Q -值谱。从前向发射Be +重构了许多谐振状态根据选择性衰变路径和相对衰变宽度，可以检测到它们的主要分子结构。22.4(2) MeV 的状态验证了先前测量和理论预测的正奇偶性键线性链分子带的带头。在 22.9(2) 和 24.2(2) MeV 处发现了两个额外的共振，它们与预测的和同一分子带的成员一致，从而为富中子碳同位素中存在奇异的簇链结构提供了新的证据。观察到一些高能共振，这也表明存在β 键分子结构；然而，仍需要进一步的研究来澄清它们在波段系统学中的归属。