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在自制的仪器上，以脉冲激光束在高真空中溅射适当的样品，产生了一系列合有1个VA族原子（N、P、As）或ⅢA族原子（B、Al）及13个以下碳原子的原子簇负离子。在实验记录的飞行时间质谱中，这些簇离子的信号强度均因其碳原子数的奇偶而发生交替变化．对实验结果的分析研究显示：这些簇离子均为直链构型．VA或ⅢA族原子位于链的一端，所有成簇原子的价键均得到满足．
On a homemade instrument, sputtering a suitable sample in a high vacuum with a pulsed laser beam produced a series of atoms (B, Al) with one Group VA atom (B, Al) and one Group VA atom The following cluster of carbon atoms anion. In the experimentally recorded time-of-flight mass spectra, the signal intensities of these cluster ions change alternately due to the odd and even number of carbon atoms. Analysis of the experimental results show that: These cluster ions are straight-chain configuration. The VA or Group IIIA atoms are located at one end of the chain and the valence bonds of all the cluster atoms are satisfied.