Desorption and trapping of argon at a 2H–W(100) surface and a test of the applicability of detailed balance to a nonequilibrium system

摘要: Molecular beam techniques have been used to probe the dynamics of trapping and trapping–desorption Ar at a hydrogen‐saturated W(100) surface. Trapping probabilities measured as function incidence energy Ei, angle θi for surface temperature Ts 85 K. We find that this probability scales approximately with Ei  cos θi, rather than or so‐called ‘‘normal energy’’  cos2 θi. approach unity low energies, falling 0.5 0.05  cos θi ∼30 100 meV, respectively. The time‐of‐flight distributions scattered are clearly bimodal in many cases, having both direct–inelastic components. latter component has characterized over wide range conditions provide information on desorption from desorbing species emerge near‐cosine angular distribution ≂85 However, these become increasingly noncosine is raised, becoming substantially b...