An accelerator mass spectrometry system with the 12UD Pelletron at the University of Tsukuba

1994 ◽  
Vol 92 (1-4) ◽  
pp. 55-57 ◽  
Author(s):  
Y. Nagashima ◽  
H. Shioya ◽  
Y. Tajima ◽  
T. Takahashi ◽  
T. Kaikura ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Mass Spectrometry System ◽  
The University

scholarly journals Technological Advances in the University of Washington Accelerator Mass Spectrometry System

Radiocarbon ◽  
1983 ◽  
Vol 25 (2) ◽  
pp. 755-760 ◽  
Author(s):  
G W Farwell ◽  
P M Grootes ◽  
D D Leach ◽  
F H Schmidt
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Ion Source ◽  
The Past ◽  
Technological Advances ◽  
Recent Developments ◽  
Mass Spectrometry System ◽  
The University ◽  
Preparation Techniques ◽  
Accelerator System

During the past year we have continued to work toward greater stability and flexibility in nearly all elements of our accelerator mass spectrometry (AMS) system, which is based upon an FN tandem Van de Graaff accelerator, and have carried out measurements of 14C/12C and 10Be/9Be isotopic abundance ratios in natural samples. The principal recent developments and improvements in the accelerator system and in our sample preparation techniques for carbon and beryllium are discussed, and the results of a study of 10Be cross-contamination of beryllium samples in the sputter ion source are presented.

RADIOCARBON IN MEXICO: FROM PROPORTIONAL COUNTERS TO AMS

Radiocarbon ◽  
2021 ◽  
pp. 1-7
Author(s):  
Corina Solís ◽  
Efraín Chávez ◽  
Arcadio Huerta ◽  
María Esther Ortiz ◽  
Alberto Alcántara ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
High Voltage ◽  
Accelerator Mass Spectrometry ◽  
Science And Technology ◽  
National Council ◽  
University Of Arizona ◽  
Technological Developments ◽  
High Voltage Engineering ◽  
The University

ABSTRACT Augusto Moreno is credited with establishing the first radiocarbon (14C) laboratory in Mexico in the 1950s, however, 14C measurement with the accelerator mass spectrometry (AMS) technique was not achieved in our country until 2003. Douglas Donahue from the University of Arizona, a pioneer in using AMS for 14C dating, participated in that experiment; then, the idea of establishing a 14C AMS laboratory evolved into a feasible project. This was finally reached in 2013, thanks to the technological developments in AMS and sample preparation with automated equipment, and the backing and support of the National Autonomous University of Mexico and the National Council for Science and Technology. The Mexican AMS Laboratory, LEMA, with a compact 1 MV system from High Voltage Engineering Europa, and its sample preparation laboratories with IonPlus automated graphitization equipment, is now a reality.

Can-AMS: The New Accelerator Mass Spectrometry Facility At The University Of Ottawa

2011 ◽  
Author(s):  
W. E. Kieser ◽  
X.-L. Zhao ◽  
I. D. Clark ◽  
T. Kotzer ◽  
A. E. Litherland ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Mass Spectrometry Facility ◽  
The University

Isobar suppression for 36Cl accelerator mass spectrometry at the University of Tsukuba

2019 ◽  
Vol 438 ◽  
pp. 131-135 ◽  
Author(s):  
Seiji Hosoya ◽  
Kimikazu Sasa ◽  
Tsutomu Takahashi ◽  
Tetsuya Matsunaka ◽  
Masumi Matsumura ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
The University

scholarly journals 10Be Analyses with a Compact AMS Facility—Are Bef2 Samples the Solution?

Radiocarbon ◽  
2004 ◽  
Vol 46 (1) ◽  
pp. 83-88 ◽  
Author(s):  
L Wacker ◽  
M Grajcar ◽  
S Ivy-Ochs ◽  
PW Kubik ◽  
M Suter
Keyword(s):  
Mass Spectrometry ◽  
Charge State ◽  
Accelerator Mass Spectrometry ◽  
Ionization Detector ◽  
Isobaric Interference ◽  
Rock Samples ◽  
Exposure Dating ◽  
Gas Ionization ◽  
Terminal Voltage ◽  
Mass Spectrometry System

The injection of 10BeF- instead of 10BeO- into a compact accelerator mass spectrometry system with a terminal voltage of 0.58 MV was investigated, because BF- molecules are unstable and isobaric interference of 10B with 10Be can thus be significantly reduced. We describe the method we developed to prepare BeF2 samples. 10Be was measured in a segmented gas ionization detector. Separation of 10Be from 10B could be achieved both for ions in the 1+ charge state with an energy of 0.8 MeV and in the 2+ charge state with an energy of 1.4 MeV. The 2+ ions are better separated, whereas the 1+ charge state has a higher transmission. 10Be/9Be ratios (~10-12) in a suite of rock samples were successfully determined for exposure dating in either charge state and compared with measurements made on the 6MV tandem.

scholarly journals The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: Status Report

Radiocarbon ◽  
2010 ◽  
Vol 52 (2) ◽  
pp. 301-309 ◽  
Author(s):  
Robert K Beverly ◽  
Will Beaumont ◽  
Denis Tauz ◽  
Kaelyn M Ormsby ◽  
Karl F von Reden ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Carbon Cycle ◽  
Accelerator Mass Spectrometry ◽  
University Of California ◽  
Status Report ◽  
Sample Throughput ◽  
Laboratory Procedures ◽  
The University

We present a status report of the accelerator mass spectrometry (AMS) facility at the University of California, Irvine, USA. Recent spectrometer upgrades and repairs are discussed. Modifications to preparation laboratory procedures designed to improve sample throughput efficiency while maintaining precision of 2–3‰ for 1-mg samples (Santos et al. 2007c) are presented.

scholarly journals 14C Background Levels in An Accelerator Mass Spectrometry System

Radiocarbon ◽  
1987 ◽  
Vol 29 (3) ◽  
pp. 323-333 ◽  
Author(s):  
J S Vogel ◽  
D E Nelson ◽  
J R Southon
Keyword(s):  
Mass Spectrometry ◽  
Late Pleistocene ◽  
Accelerator Mass Spectrometry ◽  
Measurement Precision ◽  
Small Samples ◽  
Present System ◽  
Total System ◽  
The Holocene ◽  
Anthracite Coal ◽  
Mass Spectrometry System

The levels and sources of the measurement background in an AMS 14C dating system have been studied in detail. The relative contributions to the total background from combustion, graphitization, storage, handling, and from the accelerator were determined by measuring the C concentrations in samples of anthracite coal ranging in size from 15μg to 20mg. The results show that, for the present system, the uncertainty in the background is greater than that due to measurement precision alone for very old or for very small samples. While samples containing 100μg of carbon can yield useful 14C dates throughout the Holocene, 200 to 500μg are required for dating late Pleistocene materials. With the identification of the procedures that introduce contamination, the level and uncertainty of the total system background should both be reducible to the point that 100μg of carbon would be sufficient for dating most materials.

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