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Influence of massive projectile size and energy on secondary ion yields from organic surfaces

Abstract : We investigated the influence of the projectile size and energy using Aunq+ clusters (5 < n < 400, 1 < q < 4) impacting on a glycine target with a 19q–34q keV energy range. We show that both CN− fragment and Gly− molecular ion yields are equivalent for projectiles with n > 9 and increase with the energy per projectile atoms. A maximum yield of 0.5 (50%) for both CN− and Gly− was obtained with the Au4004+ projectile at 136 keV total energy. For Gly−, the yield enhancement is linear for Aun when n > 5. Trends for the CN− fragment are different. A nonlinear yield enhancement proportional to n3 is observed for Aun when n < 9.
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http://hal.in2p3.fr/in2p3-00092314
Contributor : Marie-Christine Blanchet Connect in order to contact the contributor
Submitted on : Friday, September 8, 2006 - 4:54:49 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:32 PM

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C. Guillermier, S. Della Negra, R.D. Rickman, V. Pinnick, E.A. Schweiker. Influence of massive projectile size and energy on secondary ion yields from organic surfaces. Applied Surface Science, Elsevier, 2006, 252, pp.6529-6532. ⟨10.1016/j.apsusc.2006.02.077⟩. ⟨in2p3-00092314⟩

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