Status report: Implementation of gas measurements at the MAMS 14C AMS facility in Mannheim, Germany
By implementing a Gas Interface System (GIS), CO2 gas measurements for radiocarbon dating of small environmental samples (<100µgC) have been established at the MICADAS (Mini Carbon Dating System) AMS instrument in Mannheim, Germany. The system performance has been optimized and tested with respec...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2017
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| In: |
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms
Year: 2017, Volume: 410, Pages: 184-187 |
| ISSN: | 1872-9584 |
| DOI: | 10.1016/j.nimb.2017.08.018 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1016/j.nimb.2017.08.018 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0168583X1730811X 
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| Author Notes: | Helene Hoffmann, Ronny Friedrich, Bernd Kromer, Simon Fahrni |
| Summary: | By implementing a Gas Interface System (GIS), CO2 gas measurements for radiocarbon dating of small environmental samples (<100µgC) have been established at the MICADAS (Mini Carbon Dating System) AMS instrument in Mannheim, Germany. The system performance has been optimized and tested with respect to stability and ion yield by repeated blank and standard measurements for sample sizes down to 3µgC. The highest 12C− low-energy (LE) ion currents, typically reaching 8-15µA, could be achieved for a mixing ratio of 4% CO2 in Helium, resulting in relative counting errors of 1-2% for samples larger than 10µgC and 3-7% for sample sizes below 10µgC. The average count rate was ca. 500 counts per microgram C for OxII standard material. The blank is on the order of 35,000-40,000 radiocarbon years, which is comparable to similar systems. The complete setup thus enables reliable dating for most environmental samples (>3µgC). |
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| Item Description: | Available online 14 September 2017 14 im Titel ist hochgestellt Gesehen am 21.06.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1872-9584 |
| DOI: | 10.1016/j.nimb.2017.08.018 |