Using the reaction ⁷Li(⁷Li,¹⁰C) we tried to populate states in the tetraneutron. A peak in the energy spectrum of identified ¹⁰C, which we cannot attribute to a reaction with any other of the target components, corresponds to an excitation of the ¹⁰C+4n system of $2.93\pm 0.16$ MeV. Under different kinematic conditions an equivalent peak was observed. For a binding energy of the tetraneutron of −2.93 MeV a much larger width than the observed upper limit of $\mathrm{\Gamma }<0.24$ MeV (mainly due to experimental spread) is expected. Therefore, we favor the interpretation that this peak corresponds to ¹⁰C in the first excited state at 3.354 MeV and a tetraneutron with a binding energy of $+0.42\pm 0.16$ MeV.

使用反应⁷ Li( ⁷ Li, ¹⁰ C) 我们试图填充四中子中的状态。已识别的¹⁰ C能谱中的峰，我们不能归因于与任何其他目标组分的反应，对应于¹⁰ C+4n 系统的激发$2.93\pm 0.16$兆伏。在不同的运动条件下观察到等效峰。对于 -2.93 MeV 的四中子结合能，其宽度远大于观察到的上限$\mathrm{\Gamma }<0.24$MeV（主要是由于实验传播）是预期的。因此，我们赞成这样的解释，即该峰对应于 3.354 MeV 的第一激发态中的¹⁰ C 和结合能为$+0.42\pm 0.16$ 兆伏。