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N. G. Fazleev S. Starnes A. H. Weiss J. L. Fry 《Radiation Physics and Chemistry》2000,58(5-6):667-673
Measurements of the first high-resolution positron annihilation induced Auger spectrum from GaAs(100) are presented. The spectrum displays six As and three Ga Auger peaks below 110 eV, including a strong As M4,5VV peak at 28 eV and a less intense Ga M2,3M4,5M4,5 peak at 53 eV. The Auger peak intensities are used to obtain experimental annihilation probabilities for relevant core-level electrons. Experimental results are compared with first-principles calculations of positron surface states and annihilation characteristics of surface trapped positrons. 相似文献