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- W2055702589 abstract "We report total cross-section (TCS) results for low-energy positron scattering from the noble gas xenon. A comparison with previous measurements shows a good level of accord with the recent results of the ANU group (2011 New J. Phys. 13 125004). Very good qualitative agreement is also found with the convergent close-coupling (CCC) calculation of Fursa and Bray (2012 New J. Phys. 14 035002) over most of the common energies. By using the shape of the CCC results as a guide, we also extrapolate our measured cross sections to very low energy. With the aid of the CCC theory, we therefore derive the first experimental estimate for the positron–xenon scattering length of a = −99.2 ± 18.4 au. This value is found to be consistent with the CCC-based estimate and also with those of some other theories. This result supports the existence of a positron–xenon virtual state at a positron energy ε = (1.4 ± 0.6) × 10−3 eV." @default.
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- W2055702589 date "2012-03-23" @default.
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- W2055702589 title "Very low-energy total cross sections and the experimental scattering length for the positron–xenon system" @default.
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- W2055702589 doi "https://doi.org/10.1088/0953-4075/45/8/085203" @default.
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