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Formation mechanisms of small fragment ions in nanosecond laser induced fragmentation of C60

Qian Dong-Bin Ma Xin-Wen Zu Kai-Ling Liu Hui-Ping Zhang Da-Cheng Wen Wei-Qiang

Formation mechanisms of small fragment ions in nanosecond laser induced fragmentation of C60

Qian Dong-Bin, Ma Xin-Wen, Zu Kai-Ling, Liu Hui-Ping, Zhang Da-Cheng, Wen Wei-Qiang
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  • Received Date:  29 November 2007
  • Accepted Date:  31 January 2008
  • Published Online:  20 September 2008

Formation mechanisms of small fragment ions in nanosecond laser induced fragmentation of C60

  • 1. (1)中国科学院近代物理研究所,兰州 730000; (2)中国科学院近代物理研究所,兰州 730000;中国科学院研究生院,北京 100049

Abstract: The time of flight mass spectrometric technique was used to determine the initial mean kinetic energy of small fragment ions C+n (n≤11) produced from C60 excited by 532nm nanosecond laser pulses. The measured kinetic energy shows little variation with the fragment mass and the laser fluence in a broad range. Based on the assumption that C+30 is produced predominantly by a single electron emission followed by successive C2 evaporation from hot C60 in the nanosecond laser field,the formation of small fragments is interpreted as the complete breakup of the unstable C+30 cage structure. The interpretation is consistent with the previously observed results.

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