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- W2893156887 abstract "The report of an anomalously intense He4+ peak in electron impact mass spectra of large helium droplets created a stir 3 decades ago that continues to this day. When the electron kinetic energy exceeds 41 eV, an additional pathway opens that yields He4+ predominantly in an electronically excited metastable state. A pair of He*(23 S) atoms has been implicated based on the isolated He* energy of 19.82 eV and the 41 eV threshold, and the creation of He4+ has been conjectured to proceed via a pair of He2*( a3Σ u+) precursors. The mechanism whereby He* converts to He2* in liquid helium has remained a mystery, however. High level ab initio theory combined with classical molecular dynamics has been applied to systems comprising small numbers of He atoms. The conversion of He* to He2* in such systems is shown to be due to a simple many-body effect that yields He2* rapidly and efficiently." @default.
- W2893156887 created "2018-10-05" @default.
- W2893156887 creator A5017686746 @default.
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- W2893156887 date "2018-10-01" @default.
- W2893156887 modified "2023-10-18" @default.
- W2893156887 title "Conversion of He(2<sup>3</sup><i>S</i>) to He<sub>2</sub>(<i>a</i><sup>3</sup>Σ<sub><i>u</i></sub><sup>+</sup>) in Liquid Helium" @default.
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- W2893156887 doi "https://doi.org/10.1021/acs.jpclett.8b02454" @default.
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