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- W4378980646 abstract "Dissociative electron attachment is an important tool for investigating negative-ion resonances. We have studied the negative-ion resonances of ${mathrm{H}}_{2}$ at 10 and 14 eV using the improved velocity slice imaging technique. We obtained modulations in the kinetic energy spectrum of ${mathrm{H}}^{ensuremath{-}}$ ions obtained at 12 and 14.5 eV electron energy, consistent with the earlier reported vibrational state contributions from the higher-lying bound resonances. We show that structures obtained at 12 eV are due to predissociation of the $C{phantom{rule{0.16em}{0ex}}}^{2}{mathrm{ensuremath{Sigma}}}_{g}^{+}$ resonance consistent with the current understanding. However, based on our angular distribution measurements, we propose that the structures obtained at 14.5 eV are due to a predissociation of bound resonance of ${}^{2}{mathrm{ensuremath{Sigma}}}_{g}^{+}$ symmetry as against ${mathrm{ensuremath{Delta}}}_{g}$ that was proposed earlier. We also report that the bound ${}^{2}{mathrm{ensuremath{Sigma}}}_{g}^{+}$ resonance contributes to the observed inversion symmetry breaking near 14 eV." @default.
- W4378980646 created "2023-06-02" @default.
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- W4378980646 date "2023-06-01" @default.
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- W4378980646 title "Predissociation dynamics of negative-ion resonances of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi mathvariant=normal>H</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> near 12 and 14.5 eV using the velocity slice imaging technique" @default.
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- W4378980646 doi "https://doi.org/10.1103/physreva.107.062803" @default.
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