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- W2051201685 abstract "Charge-inversion spectra were recorded for C+(2P, 4P), Si+(2P, 4P), CH+(1Sigma+, 3Pi), SiH+(1Sigma+, 3Pi) and C2+(2Pi) cations in order to establish whether any of the resulting undissociated anions were formed in electronically excited states. For ground state C+ and Si+ cations sequential single-electron-capture reactions with CS2 were found to produce anions which were mainly in the 2D excited states, but capture by metastable C+ and Si+ cations gave, almost exclusively, ground state 4S anions. This is probably due mainly to preferential capture in the first stage, i.e. by 4P state cations into 5S states of the neutrals and by 2P state cations into singlet states as supported, in the case of C+, by evidence drawn from a target-gas variation study. Spectra recorded for CH+ and SiH+ showed that, in these cases also, ground-state (1Sigma+) cations were converted in part into excited (singlet) state anions and to a greater extent than that found for the metastable-state cations. The conversion of C2+(2Pi) cations into excited C2-(B 2Sigmau+) as well as C2-(X 2Sigmag+) and possible C2-(A 2Piu) anions was also observed but, in contrast with the case of C+, no large variation with target gas was found, presumably because of the lesser importance of first-stage state specificity." @default.
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- W2051201685 date "1993-08-14" @default.
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- W2051201685 title "Excited state anions observed in charge-inversion spectrometry: electron capture formation of C<sup>-</sup>(<sup>2</sup>D), Si<sup>-</sup>(<sup>2</sup>D,<sup>2</sup>P), CH<sup>-</sup>(<sup>1</sup>Delta), SiH<sup>-</sup>(<sup>1</sup>Delta,<sup>2</sup>Sigma<sup>+</sup>) and C<sub>2</sub><sup>-</sup>(<sup>2</sup>Sigma<sub>u</sub><sup>+</sup>)" @default.
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- W2051201685 doi "https://doi.org/10.1088/0953-4075/26/15/021" @default.
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