| Original Articles |
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More Magic Numbers in Titanium-Carbon Anion Clusters: Can This
Be Explained by Any Structural Growth Pattern?
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| ZHAI Hua-Jin1,2;LIU Bing-Chen1;ZHOU Zheng-Wen1;ZHOU Ru-Fang1;NI Guo-Quan1,2;XU Zhi-Zhan2 |
| 1Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800
2Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800
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| Cite this article: |
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ZHAI Hua-Jin, LIU Bing-Chen, ZHOU Zheng-Wen et al 2001 Chin. Phys. Lett. 18 1582-1585 |
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Abstract Titanium-carbon anion clusters with a mass range up to 1800 amu have been generated in a Smalley-type cluster source involving a target rod composed of titanium and graphite powders, and have been analysed by time-of-flight mass spectrometry. In the lower mass range (up to 1200 amu), our mass spectrum reproduces all the magic numbers, which have been reported previously, i.e., Ti3C-8, Ti6C-13, Ti7C-13, Ti9C-15, Ti13C-22, and Ti14C-24, in spite of many differences in experimental conditions. In the higher mass range (1200-1800 amu), we observe new magic numbers at Ti15C-26, Ti20C-33/Ti20C-34 and Ti25C-42, which cannot be accounted for by the previously proposed structural growth patterns. All the magic and local maximum TixC-y peaks have a metal-to-carbon ratio of approximately 1:1.7. The present results suggest a further complexity to the structural growth patterns of the transition metal-carbon mixed cluster systems.
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| Keywords:
36.40.Mr
36.40.Qv
36.40.Wa
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Published: 01 December 2001
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| PACS: |
36.40.Mr
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(Spectroscopy and geometrical structure of clusters)
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36.40.Qv
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(Stability and fragmentation of clusters)
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36.40.Wa
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(Charged clusters)
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