Recoil tritium-C-60 interaction: a channel for endohedral encapsulation of tritium in C-60

摘要

The introduction of tritium (T), with an initial kinetic energy of 2.7 MeV into the cavity of C,, using recoil implantation is studied in a Li-6(n,alpha)T activated homogenized compound matrix of Li2CO3 and C-60 Radioactive endohedral T@C-60 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 C-60 cage as against radiation damage. Solid state temperature-programmed desorption based on evolved gas showed the desorption of He-3 gas (as a beta(-) decay product from T) from the endohedral C-60 cage at a higher temperature than the T-2 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, (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 21]