O- ESD DYNAMICS FROM CONDENSED N2O

Dissocative electron attachment processes have been observed in O- ele ctron stimulated desorption from multilayer films of N2O molecules con densed on polycrystalline platinum at 30 K. Kinetic energy distributio ns, fixed kinetic energy O- yields and O- yields are reported. The ion yields show dissociative attachment processes at 9 and 15 eV which ar e not observed in the O- formation for isolated N2O molecules. The kin etic energy distributions are broad and show that a value of about 0.5 eV is obtained for the most probable kinetic energy of O- ions whatev er the incident electron energy. This indicates that the desorption dy namics are driven by the dissociation dynamics of the N2O- resonant s tates involved.