DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2001 – scientific programme

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A: Atomphysik

A 14: Ion Scattering II (with molecules and surfaces)

A 14.9: Talk

Thursday, April 5, 2001, 17:45–18:00, H1028

Novel energy and angular differential spectrometry of desorbed secondary ions — •T. Jalowy1, R. Neugebauer1, M. Hattass1, J.A.M. Pereira2, V.M. Collado2, E.F. da Silveira2, H. Schmidt-Böcking1, and K.O. Groeneveld11Institut für Kernphysik der J.W.Goethe Universität, August-Euler-Str. 6, D-60486 Frankfurt am Main, Germany — 2Depto. de Fisica, Lab. Van de Graaff, PUC-Rio, CP38071, Rio de Janeiro, Brasilien

For the measurement of the dynamic emission characteristic of desorbed secondary ions from ion-solid-collisions a new spectrometer has been developed. The spectrometer is based on the successful COLTRIMS-system developed by the group of Schmidt-Böcking in Frankfurt a.M.. Here, this system is further developed and applied to energy and angle resolved spectrometry of secondary ions desorbed in ion-solid-collisions. The study of the dynamics provides a direct access to the basic interaction mechanism of projectile ions with solid surfaces. The measured data are transformed from the detector system into the energy and angular differential distribution of desorbed secondary ions in the source system. First results will be presented and discussed.

supported by DAAD-Bonn, VOLKSWAGEN-Stiftung

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