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How the kilogram has put on weight
Date:1/6/2013

Argon atoms and it is this which makes the Newcastle machine unique.

"The Argon cluster ion gun allows us to analyse organic materials without damaging the inorganic surface, in this case the platinum alloy."

Work is underway internationally in several National Measurement Institutes to find an alternative to the IPK a standardised value for the kilogram that is not based on a matchbox- sized piece of metal. But until then, the prototype kilograms are what the world relies on for its mass scale.

"If the kilogram does put on weight then it's imperative that we understand exactly how the IPK is changing," says Professor Cumpson.


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Contact: Peter Cumpson
peter.cumpson@ncl.ac.uk
44-019-122-27911
Newcastle University
Source:Eurekalert

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