We have measured the energy dependence of the elastic specular reflection of positrons from the (111) surfaces of solid rare-gas crystals. For each sample we observe an intense first-order Bragg peak with a profile closely resembling the ideal "top-hat shaped" profile first derived by Darwin. The well-defined width and center of the peak enables us to determine the positronenergy gap and inner potential as a sensitive test of the positron-gas-atom interaction in the solid.
No takes yet. Share an insight, caveat, or question.
Gullikson et al. (1988) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: