  The structural and thermal properties of Ne and Xe gases adsorbed on the
outer surface of a large nanotube bundle have been evaluated with computer
simulation. The potential energy model and numerical techniques were used
previously to study Ar [N. M. Urban, S. M. Gatica, M. W. Cole, and J. L.
Riccardo, ``Correlation functions and thermal properties of Ar adsorbed on the
external surface of a bundle of carbon nanotubes'', Phys. Rev. B 71, 245410
(2005)]. Heat capacity results for Ne and Xe exhibit peaks associated with
reordering and ``stripe'' melting transitions for these gases.
