METHOD FOR DETERMINING THE 14C CONTENT OF A GAS MIXTURE AND ARRANGEMENT SUITABLE THEREFOR
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United States of America Patent
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Issued Date -
Sep 27, 2012
app pub date -
Aug 27, 2010
filing date -
Aug 28, 2009
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Abandoned
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Abstract
A method for determining the 14C content of a gas mixture in which 14C isotopes are present as molecule constituents, is provided. The gas mixture is provided in a measuring space, wherein infrared laser radiation is supplied to the measuring space as measurement radiation. The laser radiation to be supplied to the measuring space is deflected such that it passes through the measuring space a plurality of times by interacting with the gas mixture, wherein the laser radiation is supplied to a detector, in order to determine the absorption of laser radiation by the gas mixture and therefrom determine the 14C content. For generating the laser radiation a pulsed laser is used, which as measurement radiation emits laser pulses with a pulse duration of less than 5 μs, which are supplied to the measuring space.
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