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

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