Berlin 2012 – scientific programme

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DS: Fachverband Dünne Schichten

DS 30: Thin film characterization: structure analysis and composition (TEM, LEED, PAS)

DS 30.6: Talk

Thursday, March 29, 2012, 10:45–11:00, H 0111

Structural characterization of lead sheets for organ pipes by Positron Annihilation Spectroscopy — •Maik Butterling — Helmholtz-Zentrum Dresden-Rossendorf

An important issue when restaurating organ pipes made from lead alloys is the engineering of such material by mechanical hammering to increase the density. Microscopic effects of work-hardening on the surface near layers of lead sheets were investigated by depth resolving Doppler Broadening Spectroscopy measurements using the slow positron beam SPONSOR [1] of the Helmholtz-Zentrum Dresden-Rossendorf. The influence of small differences in the chemical composition of the samples is also discussed.

[1] W. Anwand, H.-R. Kissener, G. Brauer, Acta Phys. Polonica A 88, 7-11 (1995).