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We present a first-principles approach for calculating the positron lifetime in metals. Convenient expressions are provided for the electron-positron correlation function and the enhancement factor. Calculations on a wide range of elemental metals and some monovacancies are found to be in excellent agreement with experiment. The approximations inherent in this approach and the treatment of the core-electron contribution are discussed.
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Sterne et al. (1991) studied this question.
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