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- W1964986411 abstract "Energy losses are determined of K+ ions having suffered a head-on collision with He, H2 and D2. For K+ on He only elastic scattering is observed, in a laboratory energy range from 250 to 2500 eV. Cross sections for this process are measured as a function of energy. From the energy dependence of the cross section the steepness of the repulsive interaction potential is determined. Using an invers-power model, V(r) = K/rs, s is found to be 2.2±-0.2, over the investigated range of interaction: 0.3 Å ≤ r ≤ 0.6 Å. The collisions of K+ with H2 and D2 show inelastic energy losses due to vibrational excitation of the molecules. The experimentally observed inelastic energy transfer is compared with calculations based on a model of a collinear collision of a prticle with a harmonic oscillator. Below 22 eV centre-of-mass energy there is a good agreement between theory and experiment. At higher energies theory predicts too low values for the energy transfer, probably because it overestimates the importance of multistep collisions with the harmonic oscillator. Above 26 eV, energy losses corresponding with impulsive stripping collisions are also observed. For a better theoretical description a two- or three-dimensional collision model should be used in our opinion." @default.
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- W1964986411 date "1971-08-01" @default.
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- W1964986411 title "Energy-loss measurements of K+ ions in head-on collisions with He, H2 and D2" @default.
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- W1964986411 doi "https://doi.org/10.1016/0031-8914(71)90020-6" @default.
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