In just the past 10 years over 25,000 samples have been measured from clients in New Zealand and throughout the world.
As well as the AMS facility, the Rafter Radiocarbon Laboratory operates a modern, well equipped sample processing laboratory.
Lab manager Dr Christine Prior already has bad news for another client – an art authenticator in Hong Kong.
The drinking vessels made from rhino horn she sent for radiocarbon dating turned out to be modern fakes.
Atomic nuclei, hit by these rays, fragment and smaller particles (neutrons) are created. The impact of a neutron upon a nitrogen-14 (14N) atom results in the removal of a proton and the formation of a particle of carbon-14.
University of Waikato Photograph by Alan Hogg This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law.
It is the responsibility of the user of any material to obtain clearance from the copyright holder.
This paper considers the reliability of radiocarbon dates of moa eggshell from archaeological sites in New Zealand.
In the light of certain problems associated with alternative materials, it is suggested that eggshell is a reliable material which survives well in archaeological contexts, possesses a minimal inbuilt age and usually dates the event in question most accurately.