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- W1994187853 abstract "Following our previous study on ${mathrm{H}mathrm{e}ensuremath{-}mathrm{N}}_{2},$ we present close-coupling calculations of the vibrational quenching cross sections and rate constants for the ${mathrm{F}}_{2}(ensuremath{nu}=1,j=0)$ molecule colliding with ${}^{3}mathrm{He}$ atoms. High-level ab initio molecular electronic-structure calculations are carried out for the ${mathrm{H}mathrm{e}ensuremath{-}mathrm{F}}_{2}$ van der Waals complex at the BCCD(T) level. A potential energy surface is obtained by fitting the ab initio points using the reproducing kernel Hilbert space method. This surface exhibits two minima, the linear minimum being deeper than the T-shaped one. Close-coupling calculations are performed in the collision energy ${10}^{ensuremath{-}6}$ to $2000ensuremath{-}{mathrm{cm}}^{ensuremath{-}1}$ interval. A comparison is made with the previous investigations of the vibrational relaxation of ${mathrm{O}}_{2}$ and ${mathrm{N}}_{2}$ molecules with ${}^{3}mathrm{He}$ atoms at very low energies. We find that these three systems exhibit the same general behavior due to scattering resonances. We also analyze the very low energy limit, using a recent semiclassical approach due to Dashevskaya and Nikitin [Phys. Rev. A 63, 012711 (2000)]. We find that the simple algebraic formulas they proposed provide good estimates of the relative quenching rates at ultra-low temperatures." @default.
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- W1994187853 date "2003-09-19" @default.
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- W1994187853 title "Vibrational deactivation of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>(</mml:mo><mml:mi>ν</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mi /><mml:mi>j</mml:mi><mml:mo>=</mml:mo><mml:mn>0</mml:mn><mml:mo>)</mml:mo></mml:math>by<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline…" @default.
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- W1994187853 doi "https://doi.org/10.1103/physreva.68.032716" @default.
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