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- W1999861984 abstract "We calculate the energy spectrum of electrons detached from 0.5-MeV negative hydrogen ions in collision with helium targets using the plane-wave Born approximation. Three different models for continuum states of ${mathrm{H}}^{ensuremath{-}}$ are used to calculate electron-detachment doubly differential cross sections. The first model uses a single exponential function for the loosely bound electron of ${mathrm{H}}^{ensuremath{-}}$ and a plane wave for the detached electron. The second model is similar to the first one, but the final state is Gram-Schmidt orthogonalized. The third model includes the $s$-wave phase shifts obtained from Schwinger's variational principle. These phase shifts incorporate the radial correlations which are essential for the study of such low-energy continuum electrons. The doubly differential cross section obtained by the second and third models have a double-peak structure. These peaks are at energies different from the ones measured by Menendez and Duncan. Based on this calculation we observe that the ejected electrons are sensitive to the $s$-wave phase shifts and electron-electron correlations. This observation rejects the use of plane-wave models for the detached electrons and indicates the need for more accurate wave functions which incorporate radial and angular correlations." @default.
- W1999861984 created "2016-06-24" @default.
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- W1999861984 date "1982-12-01" @default.
- W1999861984 modified "2023-09-27" @default.
- W1999861984 title "Doubly differential cross section for electron detachment from 0.5-MeVH−in collision with He" @default.
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- W1999861984 doi "https://doi.org/10.1103/physreva.26.3198" @default.
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