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- W2047898171 abstract "The method of polarized orbitals is modified to treat low-energy scattering of electrons from highly polarizable systems, specifically alkali-metal atoms. The modification is carried out in the particular context of the $e$-Li system, but the procedure is general; it consists of modifying the polarized orbital, so that when used in the otherwise orthodox form of the method, it gives (i) the correct electron affinity of the negative ion (in this case ${mathrm{Li}}^{ensuremath{-}}$), (ii) the proper (i.e., Levinson-Swan) number of nodes of the associated zero-energy scattering orbital, and (iii) the correct polarizability. A procedure is devised whereby the scattering length can be calculated from the (known) electron affinity without solving the bound-state equation. Using this procedure we adduce a $^{1}S$ scattering length of $8.69{a}_{0}$. (The $^{3}S$ scattering length is $ensuremath{-}9.22{a}_{0}$.) The above modifications can also be carried out in the (lesser) exchange adiabatic approximation. However, they lead to qualitatively incorrect $^{3}S$ phase shifts. The modified polarized-orbital phase shifts are qualitatively similar to close-coupling and elaborate variational calculations. Quantitative differences from the latter calculations, however, remain; they are manifested most noticeably in the very-low-energy total and differential spin-flip cross sections." @default.
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- W2047898171 date "1978-11-01" @default.
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- W2047898171 title "Modification of the method of polarized orbitals for electron-alkali-metal scattering: Application to<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>e</mml:mi></mml:math>-Li" @default.
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- W2047898171 doi "https://doi.org/10.1103/physreva.18.1935" @default.
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