scholarly journals Sputter negative ion source at BINP accelerator mass spectrometer

2018 ◽  
Author(s):  
E. Konstantinov ◽  
A. Goncharov ◽  
S. Konstantinov ◽  
A. Petrozhitsky ◽  
V. Parkhomchuk ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Ion Source ◽  
Negative Ion ◽  
Accelerator Mass Spectrometer

scholarly journals Capabilities of the New SUERC 5MV AMS Facility for 14C Dating

Radiocarbon ◽  
2004 ◽  
Vol 46 (1) ◽  
pp. 59-64 ◽  
Author(s):  
S Xu ◽  
R Anderson ◽  
C Bryant ◽  
G T Cook ◽  
A Dougans ◽  
...  
Keyword(s):  
Ion Source ◽  
Negative Ion ◽  
Environmental Research ◽  
Research Centre ◽  
Performance Tests ◽  
14C Dating ◽  
Routine Measurement ◽  
Consensus Values ◽  
Accelerator Mass Spectrometer ◽  
Routine Basis

A new National Electrostatic Corporation (NEC) 5MV accelerator mass spectrometer became operational at the Scottish Universities Environmental Research Centre (SUERC) in July 2002. It has 2 Cs sputter negative ion sources: a 134-sample source (S1) for the routine measurement of all species, and a hybrid source (S2) with 40 spaces for radiocarbon measurements with either graphite or CO2 samples. A number of performance tests on graphite samples have been carried out on both sources. A precison of better than 0.3% is feasible for modern samples on a routine basis. The 14C background of the machine and the graphite preparation process blank are 0.04 ± 0.01 and 0.16 ± 0.05 pMC, respectively, indicating that 14C dating back to ~50 kyr BP is possible. The normalized 14C values for a series of reference materials agree well with the IAEA, TIRI, and FIRI consensus values. Routine measurement of 14C has been underway since May 2003. Preliminary results of performance tests on the CO2 gas ion source are also reported.

Super Sims for Ultrasensitive Impurity Analysis

1986 ◽  
Vol 69 ◽  
Author(s):  
J. M. Anthony ◽  
D. J. Donahue ◽  
A. J. T. Jull
Keyword(s):  
Mass Spectrometer ◽  
Ion Source ◽  
Particle Accelerator ◽  
Particle Identification ◽  
Radioactive Isotopes ◽  
Tandem Accelerator ◽  
Accelerator Mass Spectrometer ◽  
Source Contamination ◽  
Stable Elements ◽  
Current Detection

AbstractThe technique of accelerator mass spectrometry has been used extensively in recent years as a method for detecting low levels (< 1 part per trillion atomic) of radioactive isotopes in solid materials. The technique consists of a Secondary Ion Mass Spectrometer (SIMS) system in which the conventional mass spectrometer has been replaced by a particle accelerator. We have applied this method to the study of stable elements, primarily semiconductor dopants, using the Univ. of Arizona tandem accelerator mass spectrometer. The use of tandem accelerators allows molecular interferences to be removed due to dissociation of the molecules. Particle energies of several MeV are produced, and energy spectroscopy removes the background due to scattered particles, detector noise, etc. to provide positive particle identification. The current detection limits (-10 parts per billion atomic) are primarily due to ion source contamination and their origin is discussed. Removal of this contamination will allow parts per trillion level detection of stable elements.

scholarly journals Online 13C and 14C Gas Measurements by EA-IRMS–AMS at ETH Zürich

Radiocarbon ◽  
2016 ◽  
Vol 59 (3) ◽  
pp. 893-903 ◽  
Author(s):  
Cameron P McIntyre ◽  
Lukas Wacker ◽  
Negar Haghipour ◽  
Thomas M Blattmann ◽  
Simon Fahrni ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Global Carbon Cycle ◽  
Ion Source ◽  
Data Sets ◽  
Accelerator Mass Spectrometer ◽  
Mass Spectrometer System ◽  
Gas Measurements ◽  
Rich Data ◽  
Spectrometer System ◽  
Global Carbon

AbstractStudies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13C and 14C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a stable isotope mass spectrometer and an accelerator mass spectrometer system fitted with a gas ion source. We first tested the system with standard materials and then reanalyzed a sediment core from the Bay of Bengal that had been analyzed for 14C by conventional methods. The system was able to produce %C, 13C, and 14C data that were accurate and precise, and suitable for the purposes of our biogeochemistry group. The system was compact and convenient and is appropriate for use in a range of fields of research.

scholarly journals The 3MV Multi-Element AMS in Xi'an, China: Unique Features and Preliminary Tests

Radiocarbon ◽  
2006 ◽  
Vol 48 (2) ◽  
pp. 285-293 ◽  
Author(s):  
Weijian Zhou ◽  
Xiaolei Zhao ◽  
Lu Xuefeng ◽  
Liu Lin ◽  
Wu Zhengkun ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Ion Source ◽  
Point Of View ◽  
Low Energy ◽  
Accelerator Mass Spectrometer ◽  
Acceleration Tube ◽  
Tube Structure

A 3MV multi-element accelerator mass spectrometer (AMS) has been installed in Xi'an, China, and preliminary tests have been completed. The results of both background and precision tests for 4 nuclides are 3.1 × 10–16, 0.2% (14C); 1.8 × 10–14, 1.4% (10Be); 2.3 × 10–15, 1.14% (26Al); and 2.0 × 10–14, 1.75% (129I). The unique features of this facility are the newly developed ion source accepting solid and CO2 samples; the specially designed low-energy injector, including a “beam blanking unit” and “Q-snout”; the acceleration tube structure with the combined magnetic and electrostatic suppression; and the function of the slit stabilization in the post-acceleration system. These features are discussed in terms of the end-user's point of view.

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