Analysis of Historic Pottery - ISNAP

isnap.nd.edu

Analysis of Historic Pottery - ISNAP

Elizabeth High

Advisor: Dr. Michael Wiescher

www.hudsonsantiques.co.uk/.../RalphHall.html


Particle Induced X-ray Emission

Electron in orbit around the nucleus,

in quantized energy level.

Protons from the accelerator

impinge upon the target.

electron

nucleus

proton

Interaction with the passing proton

excites the electron into a higher energy

orbit.

The atom spontaneously de-excites,

releasing the excess energy in the form

of an X-ray.


Tandem FN Accelerator

LabView

KN

Accelerator

SiLi Detector


PIXE is a non-destructive technique.

It is a fairly easy technique to use.

The process allows for analysis below the surface of the

material.

PIXE allows researchers to see trace elements within

the samples.


Voltage

Channel number

Energy KeV


Mn

Fe

Fe

Run 100 Run 216

Pb

Zn

Pb

K,

Ca,

Ar

K,

Ca,

Ar


K

Ca

Si

Cr Mn

Fe

Co Cu Zn

Pb

Sn


There is no Sulfur in the chipped spots, but it appears in all of

the other runs.

All of the runs have Ca, K, and Fe.

There is an increase in the amount of Cobalt seen in the blue

pigments compared to the other colors.

There is a notable presence of Lead in all of the runs.

There is a difference in the concentrations of the elements for different

samples, even for runs on the same color.

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