Event 

Title:
Seminars at the Accelerator - Looking for the best ion beam to study luster ceramics
When:
23.11.2011 - 23.11.2011
Where:
CMAM - Madrid
Category:
Informal seminars at the Accelerator

Description

Speaker: Aurelio Climent Font

Looking for the best ion beam to study luster ceramics

For the elemental analysis of complex structures (e.g. complex composition, varying composition in lateral dimension as well as in the first micrometers below the surface) the simultaneous applications of complementary methods is of great advantage. This option is given by ion beam analysis (IBA) techniques combining Rutherford backscattering spectrometry (RBS) with particle induced x-ray emission (PIXE) in the MeV energy range. While RBS offers the possibility of compositional depth profiles determination, PIXE detects almost unambiguously the presence of trace elements heavier than Na. On typical small accelerators for IBA the standard particle mostly used for PIXE is the proton at energies of a few MeV, while alphas are routinely used for RBS. As a particle which may be used to combine both processes for simultaneous analysis sufficiently well and advantageously as a compromise, we have used He-3 in addition to protons and alphas at equivalent velocities. Following a survey on standards, mainly metallic samples of different elements, thick and thin compared to the ion range, we analyzed various colored ornaments of a ceramic piece with luster glaze layers, an Abbasid lustre sherd (9th century AD, Louvre museum inventory MAOS 657). We paid special attention for determining the Cu and Ag concentration, the main elements in the luster decoration as well as to concentration gradients of Na and K at the depth where the metallic particles are present.

Venue

CMAM
Venue:
CMAM   -   Website
Street:
Faraday 3, Campus de Cantoblanco
ZIP:
28049
City:
Madrid
Country:
Country: es

Description

The seminar takes place at the meeting room of the CMAM