Measurement of the Positron Surface-State Lifetime for Al
作者： K. G. Lynn , W. E. Frieze , Peter J. Schultz
DOI: 10.1103/PHYSREVLETT.52.1137
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摘要: The decay rate has been determined for positrons annihilating with electrons while localized in the image-induced potential well at (110) surface of a clean well-annealed single crystal Al 300 K. lifetime associated this state was found to be 580 \ifmmode\pm\else\textpm\fi{} 10 psec. This value, which never before directly measured, is disagreement present theories. Changes spectra were also from ion sputtering and exposure various amounts oxygen.
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