In addition to the diffraction peaks
of SnO2, reflections by Pd and Pt are also observed. The peaks
denoted by the solid and open circles are caused by Pd and
Pt nanoparticles, whose lattice constants are a = 0.389 nm (JCPDS
Card No. 89-4897) and a = 0.397 nm (JCPDS Card No. 88-2343),
respectively. This again confirms the creation of bimetallic Pd/Pt
nanoparticles by -ray radiolysis.