Resonant charge transfer at dielectric surfaces

摘要: We report on the theoretical description of secondary electron emission due to resonant charge transfer occurring during collision metastable N2(3Σ+ u ) molecules with dielectric surfaces. The is described as a two step process consisting capture form an intermediate shape resonance N2 -(2Π g and subsequent by decay this ion, either its natural life time or interaction surface. modeled using Keldysh Green’s function technique negative ion combination rate equation approach. find electrons be very efficient clearly dominating over surface-induced decay. Secondary coefficients are calculated for Al2O3, MgO, SiO2, diamond at several kinetic energies projectile. With exception MgO turn out order 10-1 whole range energies. This rather large value direct consequence acting relay state emission.