Electron stimulated desorption of solid argon via exciton creation

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Abstract
The correlation between the intrinsic luminescence of solid argon excited by slow electrons (a few eV to 100 eV) and desorption was studied. Related to exciton creation, a sharp threshold of desorption and of luminescence is observed at the same energy of the impinging electrons. The desorption rate is proportional to the exciton density at the surface. The surface nature of different luminescence bands is established. The mechanism of desorption corresponds to the mechanism of cavity formation around self-trapped excitons in solid argon