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- W2331079897 abstract "When a low-pressure (${10}^{ensuremath{-}2}$-Torr) sample of ${mathrm{N}}_{2}$ or CO is exposed to a beam of linearly polarized synchrotron radiation (18-34 eV), electronically excited molecular ions are formed whose subsequent unresolved emission is found to be partially polarized. The degree of polarization of the ${mathrm{N}}_{2}^{+}$ $B^{2}ensuremath{Sigma}_{u}^{+}ensuremath{-}X^{2}ensuremath{Sigma}_{g}^{+}$ fluorescence (ensuremath{sim}391 nm) and the C${mathrm{O}}^{+}$ $B^{2}ensuremath{Sigma}^{+}ensuremath{-}X^{2}ensuremath{Sigma}^{+}$ fluorescence (ensuremath{sim}220 nm) is studied as a function of the energy of the ionizing radiation from threshold to higher energies. This information determines the alignment of the photoion, which in the case of ${mathrm{N}}_{2}$ must be corrected for depolarization caused by spin-rotation and hyperfine interaction. From the polarization of the fluorescence we deduce $ensuremath{gamma}$, the ratio of parity-unfavored to the sum of parity-favored contributions for photoelectron ejection. Comparison of the dynamical channel ratio $ensuremath{gamma}$ with theoretical calculations for $ensuremath{sigma}$- and $ensuremath{pi}$-photoelectron ejection shows poor agreement for ${mathrm{N}}_{2}$ and fair agreement for CO." @default.
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- W2331079897 title "Determination of rotational alignment of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msubsup><mml:mrow><mml:mi mathvariant=normal>N</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>B</mml:mi><mml:mi /><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Σ</mml:mi></mml:mrow><mml:mrow><mml:mi>…" @default.
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- W2331079897 doi "https://doi.org/10.1103/physreva.28.2217" @default.
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