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- W2038072904 abstract "Equilibrium charge-state fractions of energetic deuterium ions and atoms emerging from alkaline-earth (magnesium, calcium, strontium, and barium) vapor targets are reported in the range of 0.3- to 3-keV incident ${mathrm{D}}^{+}$ energy. Deuterium negative-ion production in thick barium and calcium vapor targets equals similar production in cesium vapor (ensuremath{sim}34%). Moreover, the maxium ${mathrm{D}}^{ensuremath{-}}$ production in strontium vapor exceeds that for all other known gas or vapor targets and reaches 50% at 500 eV. Theory does not quantitatively describe these results, although ab initio molecular-interaction-energy calculations on the neutral and negative-ion CaH systems lead to the prediction of large ${mathrm{D}}^{ensuremath{-}}$ yields at low energies. The theoretical prediction is based on the lack of a strong coupling between the negativeion and neutral molecular states. This implies that there are small ${mathrm{D}}^{ensuremath{-}}$ electron-detachment cross sections at energies less than 1 keV. The present measurements agree with previous measurements done at higher energies." @default.
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- W2038072904 date "1982-08-01" @default.
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- W2038072904 title "D−production by charge transfer of (0.3 - 3)-keVD+in thick alkaline-earth vapor targets: Interaction energies forCaH+, CaH, andCaH−" @default.
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- W2038072904 doi "https://doi.org/10.1103/physreva.26.775" @default.
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