北京大学学报（自然科学版）

中子辐照对纳米金刚石颗粒的影响——Raman光谱分析

郭延军1, 郑辙1, 冯有利1, 李永章2   

  1. 1北京大学地球与空间科学学院地质学系，北京，100871；2中国原子能科学研究院，北京，102413
  • 收稿日期:2003-02-19 出版日期:2004-03-20 发布日期:2004-03-20

Effects of Neutron Irradiation on Nanodiamond: Raman Spectroscopy Study

GUO Yanjun1, ZHENG Zhe1, FENG Youli1, LI Yongzhang2   

  1. 1Department of Geology, School of Earth and Space Sciences, Peking University, Beijing, 100871; 2China Institute of Atomic Energy, Beijing, 102413
  • Received:2003-02-19 Online:2004-03-20 Published:2004-03-20

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摘要： 利用Raman光谱对经中子辐照处理的纳米金刚石微粉进行了分析，中子能量为0.5～10MeV，辐照剂量1016～1017 n·cm-2。中子辐照引起缺陷及应力使Raman峰发生宽化和红移。同时，在中子引入的能量的作用下，纳米金刚石中部分sp2杂化的石墨相转变为sp3杂化的金刚石相。

关键词: 中子辐照, 纳米金刚石, Raman光谱

Abstract: Nanodiamond treated by neutron irradiation is studied by Raman spectroscopy. The energy of the fast neutron flow is 0.5～10MeV. The diamonds were irradiated at temperature about 45 ℃ up to doses of 1016～1017 n·cm-2. After irradiation, the Raman band assigns to sp3 diamond near 1326 cm-1move to lower wavenumber and its half width increased. And the Raman spectroscopy also shows that affected by the energy induced by neutron flow, some the sp2 graphite phase in nanodiamond powder transform to sp3 diamond during the irradiation process.

Key words: neutron irradiation, nanodiamond, Raman spectroscopy

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