Fast and Accurate Sequential Injection AMS with Gated Faraday Cup Current Measurement
Issue Date
2004-01-01Keywords
absolute ageaccelerator mass spectroscopy
C 14
carbon
electrical currents
frequency
isotope ratios
isotopes
mass spectroscopy
measurement
methods
precision
radioactive isotopes
sequential injection
spectroscopy
stable isotopes
Metadata
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Klein, M., Mous, D. J. W., & Gottdang, A. (2004). Fast and accurate sequential injection AMS with gated Faraday cup current measurement. Radiocarbon, 46(1), 77-82.Journal
RadiocarbonDescription
From the 18th International Radiocarbon Conference held in Wellington, New Zealand, September 1-5, 2003.Additional Links
http://radiocarbon.webhost.uits.arizona.edu/Abstract
Sequential injection or bouncing has a number of properties which can lead to a reduction of the analysis accuracy if no appropriate measures are taken. A special injection system has been developed in order to eliminate these shortcomings. The influence of source glitches or instabilities on the measured isotopic ratio is substantially reduced by a high cycling frequency. A fast beam-blanking unit guarantees the needed accuracy of the injection periods. Background currents are avoided by synchronizing the current measurement for the stable isotopes with their injection periods. To achieve the required speed and precision of the gated measurement, new instrumentation was developed. The elimination of background contributions allows an efficiency for radiocarbon counting as high as 95% at a cycling frequency of 100 Hz.Type
Proceedingstext
Language
enISSN
0033-8222ae974a485f413a2113503eed53cd6c53
10.1017/S0033822200039370