Browsing by Subject "kinetic energy"
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Item New Molecular Collisional Interaction Effect in Low-Energy Sputtering(American Physical Society, 1998-07-20) Yao, Y.; Hargitai, Z.; Albert, M.; Albridge, R.G.; Barnes, A.V.; Gilligan, J.M.; Ferguson, B. Pratt; Lupke, G.; Gordon, Vernita D.; Tolk, N.H.An unexpected pronounced enhancement is observed in sputtering yields per atom for N2+ compared to N+ from a polycrystalline gold target. This effect is seen when the kinetic energy per projectile atom is below 500 eV and increases as projectile energy decreases to near-threshold energies. Enhancements for O2+ over O+ begin at even lower kinetic energies below 100 eV per atom. This new molecular interaction effect may be explained qualitatively by invoking a simple energy transfer model which involves the vibrational frequency of the molecule and the collisional interaction time. [S0031-9007(98)06668-X]