Recoil tritium–C₆₀ interaction: a channel for endohedral encapsulation of tritium in C₆₀

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• 作者：Sahoo ; Rashmi R. ; Bokare ; Alok D. ; Patnaik ; Archita
• 关键词：A. Fullerene ; B. Activation ; C. Chromatography ; Mass spectrometry ; Temperature-programmed desorption
• 刊名：Carbon
• 出版年：2002
• 出版时间：2002
• 年：2002
• 卷：40
• 期：13
• 页码：2453-2460
• 全文大小：840 K

文摘

The introduction of tritium (T), with an initial kinetic energy of 2.7 MeV into the cavity of C₆₀ using recoil implantation is studied in a ⁶Li(n,α)T activated homogenized compound matrix of Li₂CO₃ and C_60. Radioactive endohedral T@C₆₀ could be detected through the liquid scintillation spectrometry coupled with high-pressure liquid chromatography (HPLC). Fast atom bombardment mass spectrometry provided evidence for the retainment of C₆₀ cage as against radiation damage. Solid state temperature-programmed desorption based on evolved gas showed the desorption of ³He gas (as a β⁻ decay product from T) from the endohedral C₆₀ cage at a higher temperature than the T₂ and T₂O trapped species at the defect sites and from the ordered crystallographic network of Li₂CO₃, respectively. The non-isothermal kinetics of the helium desorption, as a function of temperature evidenced a diffusion controlled process.