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- W3043188118 abstract "The energy spectrum from the spin-forbidden electronic autodetachment from the metastable He/sub 2//sup -/(/sup 4/Pi/sub g/) ion has been measured. The single-peaked continuum, resulting from a vertical transition to the repulsive wall of the He/sub 2/(X/sup 1/..sigma../sub g//sup +/) ground state, has a maximum at 15.70 +- 0.15 eV. For a rotationally cool beam, the spectrum is inconsistent with the existing potentials of He/sub 2//sup -/ and He/sub 2/(X/sup 1/..sigma../sub g//sup +/). A suitable fit, neglecting rotational effects, would require an increase of 0.06 A in the calculated R/sub e/ of He/sub 2//sup -/. However, a very good fit can also be obtained from the existing potentials by assuming a rotationally hot (15 000 K) distribution. Surprisingly, both fits require contributions from levels v>0, which are known to undergo vibrational autodetachment to He/sub 2/(a/sup 3/..sigma../sub u//sup +/). For such contributions, the latter process must be exceptionally slow (<10/sup 6//s)." @default.
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- W3043188118 date "1988-04-01" @default.
- W3043188118 modified "2023-09-25" @default.
- W3043188118 title "He2-[4Πg]→He2[X1Σ+] autodetachment energy spectrum: Assessment of theHe2−andHe2ground-state potentials" @default.
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- W3043188118 doi "https://doi.org/10.1103/physreva.37.2778" @default.
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