scholarly journals Optimizing a microwave gas ion source for continuous-flow accelerator mass spectrometry

2012 ◽  
Vol 83 (2) ◽  
pp. 02B304 ◽  
Author(s):  
K. F. von Reden ◽  
M. L. Roberts ◽  
J. R. Burton ◽  
S. R. Beaupré
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Continuous Flow ◽  
Ion Source

A microbeam Cs ion source for accelerator mass spectrometry

1998 ◽  
Vol 69 (3) ◽  
pp. 1353-1358 ◽  
Author(s):  
S. H. Sie ◽  
T. R. Niklaus ◽  
G. F. Suter ◽  
F. Bruhn
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Ion Source

scholarly journals Radiocarbon with Gas Chromatography

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 711-716 ◽  
Author(s):  
Christopher Bronk Ramsey ◽  
R. E. M. Hedges
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Pilot Study ◽  
Accelerator Mass Spectrometry ◽  
Ion Source ◽  
Tracer Studies ◽  
Chemical Fractions ◽  
Peak Sensitivity ◽  
Accelerator System

In 14C tracer studies, and when looking for modern contamination in archaeological samples, it is often necessary to measure the 14C concentration of individual chemical fractions. Gas chromatography (GC) is one method that is frequently used for separation of chemical fractions. The gas ion source at the Oxford Radiocarbon Accelerator Unit for accelerator mass spectrometry (AMS) provides the opportunity to measure fractions from a GC instrument directly. Although the first investigations are likely to be 14C tracer studies, such a GC-AMS system could find much wider application. We present results from a pilot study of the peak sensitivity, baseline stability and crosstalk of the accelerator system used in this way. We also discuss the practical considerations in developing a GC-AMS instrument for routine use.

scholarly journals Rapid radiocarbon ( 14 C) analysis of coral and carbonate samples using a continuous‐flow accelerator mass spectrometry (CFAMS) system

2011 ◽  
Vol 26 (4) ◽  
Author(s):  
Cameron P. McIntyre ◽  
Mark L. Roberts ◽  
Joshua R. Burton ◽  
Ann P. McNichol ◽  
Andrea Burke ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Continuous Flow

scholarly journals Using a Gas Ion Source for Radiocarbon AMS and GC-AMS

Radiocarbon ◽  
2004 ◽  
Vol 46 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Christopher Bronk Ramsey ◽  
Peter Ditchfield ◽  
Martin Humm
Keyword(s):  
Mass Spectrometry ◽  
Carbon Dioxide ◽  
Gas Chromatography ◽  
Continuous Flow ◽  
Direct Injection ◽  
Ion Source ◽  
Handling System ◽  
Peak Separation ◽  
Similar Work ◽  
High Voltage Engineering

This paper reports on the performance of a new method of sample injection using the High Voltage Engineering Europa (HVEE) SO-110 ion source jointly developed between HVEE and Oxford. In order to use this source, we have developed a new gas handling system which works on the direct injection of carbon dioxide mixed into a continuous flow of helium. Preliminary work has also been carried out on online gas chromatography-accelerator mass spectrometry (GC-AMS). In this application, a GC is directly coupled to the AMS system using a GC-IRMS combustion interface and Nafion™ drier. We show here results for the measurement of natural abundance in separated compounds with good peak separation and precisions of about 10%. This type of system should be ideal for source apportionment studies, biomedical, and other similar work where high precision is not required but where sample sizes are very low.

Searching For A Suitable Gas Ion Source For 14C Accelerator Mass Spectrometry

2007 ◽  
Author(s):  
Karl von Reden ◽  
Mark Roberts ◽  
Baoxi Han ◽  
Robert Schneider ◽  
John Wills
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Ion Source

New design of an ion source for accelerator mass spectrometry at the Lund Pelletron

1998 ◽  
Vol 69 (2) ◽  
pp. 1188-1190 ◽  
Author(s):  
Per Persson ◽  
Kim Freimann ◽  
Ragnar Hellborg ◽  
Kjell Håkansson ◽  
Göran Skog ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Ion Source

Chairman’s introduction

1987 ◽  
Vol 323 (1569) ◽  
pp. 3-4
Keyword(s):  
Mass Spectrometry ◽  
Water Sample ◽  
Accelerator Mass Spectrometry ◽  
Ion Source ◽  
Unique Combination ◽  
Accelerated Particles

The first significant experiment using the technique of accelerator mass spectrometry (AMS) was reported by Alvarez & Cornog in 1939. It was widely thought at the time that tritium , and not 3 He, was stable, and with that in m ind Rutherford had asked Aston to search for hydrogen of mass three in a specially prepared water sample. The result was negative and Rutherford reported this in the last paper he wrote, which was published in Nature a few months before his death in 1937. Alvarez realized that if 3 He, and not tritium , were stable then it should be present in ordinary helium, presumably at a low abundance level. He therefore fed helium into the ion source of the Berkeley 60 inch cyclotron and soon demonstrated the existence of a 24 MeV beam corresponding to mass three and charge two, a unique combination. This identification was confirmed by a measurement of the range of the accelerated particles. Subsequently, Alvarez & Cornog showed that the abundance of 3 He in atmospheric helium was about ten times greater than in well helium, although their absolute abundances were rather lower than the currently accepted values.

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