材料期刊网

An Monte Carlo (MC) simulation program has been used to study ion mass dependence for the low energy channeling of natural- and pseudo-Ar ions in single-wall nanotubes. The MC simulations show that the channeling critical angle Psi(C) obeys the (E) (- 1/2) and the (M-1) (- 1/2) rules, where E is the incident energy and M-1 is the ion mass. The reason for this may be that the motion of the channeled (or de-channeled) ions should be correlated with both the incident energy E and the incident momentum (2M(1)E)(1/2), in order to obey the conservation of energy and momentum. (c) 2008 Elsevier B.V. All rights reserved.