Flow technique for measuring the sticking probabilities of simultaneously adsorbed gases on metal films: application to the simultaneous adsorption of deuterium and nitrogen on thin iron film at 78 K

A flow technique for measuring the partial sticking probabilities of severa l gases simultaneously interacting with thin metal films has been described . The reaction cell was constructed to allow the simultaneous interaction o f several gases and continuous measurement of their partial pressures in th e course of their interaction with metal film. The method has been applied to measure the sticking probabilities of deuterium and nitrogen, simultaneo usly interacting with thin iron films at 78 K. The features of sticking pro bability dependence on the quantity of nitrogen and deuterium consumed have been compared with the corresponding dependencies measured for D-2 and N-2 separately adsorbed on clean iron film. The results of such a comparison h ave been considered in terms of a complex interaction between deuterium and nitrogen adspecies adsorbed in different ways on thin iron film. (C) 1999 Elsevier Science Ltd. All rights reserved.