Application of accelerator mass spectrometry to environmental and paleoclimate studies at the University of Arizona

2006 ◽  
pp. 3-23 ◽  
Author(s):  
A.J. Timothy Jull ◽  
George S. Burr ◽  
J. Warren Beck ◽  
Gregory W.L. Hodgins ◽  
Dana L. Biddulph ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
University Of Arizona ◽  
The University ◽  
Paleoclimate Studies

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.

scholarly journals New Radiocarbon Dates for the Reed Mat from the Cave of the Treasure, Israel

Radiocarbon ◽  
2001 ◽  
Vol 43 (3) ◽  
pp. 1247-1254 ◽  
Author(s):  
Gerald E Aardsma
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dates ◽  
Three Samples ◽  
University Of Arizona ◽  
Late Chalcolithic ◽  
The University

Modern radiocarbon dates were procured for the Cave of the Treasure, Israel reed mat at the University of Arizona accelerator mass spectrometry (AMS) laboratory in late 1999 and early 2000. Three samples from various locations on the mat were dated. One of these samples was dated twice, and another was dated three times, yielding a total of six new radiocarbon dates on the mat. The new 14C dates overturn expectations of a late Chalcolithic, roughly 3500 BC, date for the origin of the mat. It is suggested that the mat may not have been of common use but may rather have been a religious heirloom with a history stretching back into the early Chalcolithic.

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 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 Radiocarbon Dating with the University of Washington Accelerator Mass Spectrometry System

Radiocarbon ◽  
1986 ◽  
Vol 28 (2A) ◽  
pp. 237-245 ◽  
Author(s):  
Pieter M Grootes ◽  
Minze Stuiver ◽  
George W Farwell ◽  
Donald D Leach ◽  
Fred H Schmidt
Keyword(s):  
Mass Spectrometry ◽  
Organic Carbon ◽  
Accelerator Mass Spectrometry ◽  
Dry Valleys ◽  
Tandem Accelerator ◽  
University Of Washington ◽  
Annual Growth Rings ◽  
History Of ◽  
Atmospheric Changes ◽  
The University

The University of Washington FN tandem accelerator mass spectrometry (AMS) system has been used in a series of 14C studies. 1) The 14C concentrations in annual growth rings for 1962, 1963, and 1964 of a Sitka spruce, each divided into ten sequential segments, were measured; a full and rapid response of tree-ring cellulose to atmospheric changes in 14CO2 is indicated, with a delay, if any, of not more than three weeks. 2) The C concentrations in two chemical fractions of dissolved organic carbon and in two fractions (by size) of particulate organic carbon were measured for Amazon River samples from several locations. All contain bomb carbon, but the amounts differ significantly. 3) Algae samples from lakes in the dry valleys of Antarctica were dated in order to assist in the reconstruction of the climatic history of Antarctica. 4) Background studies indicate that the contribution of the AMS system itself to the observed 14C concentrations is equivalent to an age of ca 60,000 14C yr BP; for a prepared sample of 5mg of carbon the background corresponds to ca 50,000 years.

scholarly journals Radiocarbon Sample Preparation Procedures and the First Status Report from the Bristol Radiocarbon AMS (BRAMS) Facility

Radiocarbon ◽  
2019 ◽  
Vol 61 (5) ◽  
pp. 1541-1550 ◽  
Author(s):  
Timothy D J Knowles ◽  
Paul S Monaghan ◽  
Richard P Evershed
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Method Validation ◽  
Accelerator Mass Spectrometry ◽  
Status Report ◽  
Sample Type ◽  
Pretreatment Method ◽  
Wide Range ◽  
University Of Bristol ◽  
The University

ABSTRACTThe Bristol Radiocarbon Accelerator Mass Spectrometry (BRAMS) Facility was established at the University of Bristol after the commissioning of our dedicated sample preparation laboratories and the installation and acceptance of the BrisMICADAS AMS in 2016. Routine measurements commenced in mid-2016, once validation was completed for each sample type. Herein, we give an overview of the standard pretreatment methods currently employed in the Facility and the results of radiocarbon (14C) determinations on a wide range of standards, blank materials, and intercomparison samples which have been measured during our extensive pretreatment method validation program and during our routine 14C analyses.

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