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- W2000653336 abstract "We report rovibrational populations of ${mathrm{D}}_{2}$ desorbing recombinatively from sulfur-covered Pd(100). The palladium surface is poisoned with an ordered $c(2ifmmodetimeselsetexttimesfi{}2)$ overlayer corresponding to a coverage of ${ensuremath{Theta}}_{S}ensuremath{approx}0.5 mathrm{ML}.$ Desorbing ${mathrm{D}}_{2}$ molecules are detected with ${(1+1}^{ensuremath{'}})$ REMPI via various ${B}^{1}{ensuremath{Sigma}}_{u}^{+}ensuremath{leftarrow}{X}^{1}{ensuremath{Sigma}}_{g}^{+}$ Lyman bands using tunable vacuum ultraviolet laser radiation for the excitation step. Rotational quantum states ${J}^{ensuremath{''}}=0--12$ in the vibrational ground and ${J}^{ensuremath{''}}=0$ to 8 in the first vibrational excited state are measured. Experiments are performed for surface temperatures in the range from ${T}_{S}=500--800 mathrm{K}.$ Rotational energies lower and vibrational energies higher than the corresponding surface temperature are observed. The vibrational energies are higher than those of molecules desorbing from a clean Pd surface. The experimental results are compared with quantum dynamical calculations for the desorption of ${mathrm{H}}_{2}$ from a $p(2ifmmodetimeselsetexttimesfi{}2)$ sulfur-covered Pd(100) surface, based on a potential energy surface derived from density functional calculations. While the observed rotational cooling for molecules in the vibrational ground state is reproduced by the calculations, the vibrational effects are underestimated." @default.
- W2000653336 created "2016-06-24" @default.
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- W2000653336 date "2002-09-09" @default.
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- W2000653336 title "Rotational and vibrational population of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>D</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>desorbing from sulfur-covered Pd(100)" @default.
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- W2000653336 doi "https://doi.org/10.1103/physrevb.66.115405" @default.
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