A radiotracer study of slow electron interaction with CO on polycrystalline Mo

The interaction of slow (50-300eV) electrons with CO chemisorbed on a polycrystalline Mo ribbon was investigated. A radiotracer was employed to monitor C concentration on the surface and desorbed ions were collected. From the time variation of the ion current, total electron induced desorption cross sections of 3.7 x 10-17 to 1.6 x 10-16 cm2 were obtained. The desorption cross section for C containing species was found to be less than 1.4 x 10-19cm2. In addition, the sticking coefficient for CO on No was found to be 0.13-0.16. These results are discussed in terms of the states of chemisorbed CO and the conclusions of other investigations of this system. (Auth.)