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- W2300454295 abstract "Integral elastic scattering cross sections of alkali ions (Li/sup +/, K/ sup +/ , and Cs/sup +/) in collision with room temperature hydrogen molecules (H/ sub 2/ and D/sub 2/) were measured in the ion energy range 500-4000 eV. Some difference in the cross sections due to the replacement of the target gases were found in K/sup +/- and Cs/sup +/-hydrogen systems. Most of the difference can be explained by the differance of the target masses, repulsive potentials deduced from the cross sections in a usual manner are represented by the following formulas independently of the isotopes: V(R) = 345 exp(-4.31 R), 0.88 < R < 1.43; K/sup +/: V(R) = 810 exp(-3.52 R), 1.33 < R < 1.98; and Cs/sup +/ = 1110 exp(- 3.26 R), 1.55 < R < 2.25; where V(R) is in units of electron volts and R is in angstroms. (auth) We have carried out a detailed thoeretical study of the 02-11 and 03-12 near-resonant vibrational energy transfer processers which can occur during thc collision of two D/sub 2/ molecules. Assuming a collinear geometry, we have solved the collision dynamies fully quantum-mechanically, using a more » modified version of the Gordon program. We have investigated three different model potentials and one full ab initio potential surface. Both at high and low collision energies, the V-V transition probabilities are extremely sensitive to the particular potential surface used. We further show that nearest-atom model petentials greatly overestimate transition probabilities at high energies. Also of interest is the result that at mederate to high energies near-resonant V-V transfer probabilities are largely insensitive to the choice of a harmonic or Morse oscillator description of thc two colliding molecules. Finally we show that the simple two-state approximation appears to be remarkably accurate over a wide range of energies. (auth) « less" @default.
- W2300454295 created "2016-06-24" @default.
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- W2300454295 date "1973-12-15" @default.
- W2300454295 modified "2023-09-24" @default.
- W2300454295 title "Experimental determination of repulsive potentials between alkali ions (Li$sup +$, K$sup +$, and Cs$sup +$) and hydrogen molecules (H$sub 2$ and D$sub 2$)" @default.
- W2300454295 hasPublicationYear "1973" @default.
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