@article{Xu:2014:10.1016/j.nimb.2014.04.009,
author = {Xu, S and Freeman, SPHT and Rood, DH and Shanks, RP},
doi = {10.1016/j.nimb.2014.04.009},
journal = {Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms},
pages = {42--45},
title = {<sup>26</sup>Al interferences in accelerator mass spectrometry measurements},
url = {http://dx.doi.org/10.1016/j.nimb.2014.04.009},
volume = {333},
year = {2014}
}

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TY  - JOUR
AB  - The identification of interferences to 26Al was conducted with a 5 MV tandem accelerator mass spectrometer. In addition to 9Be 1+, 17O2+ and 35Cl4+ ions observed previously, this study confirmed existence of the most significant interference 37Cl4+ continuum ion to 16 MeV 26Al3+ by measuring primary standard mixed with Cl with various 37Cl/35Cl ratios. The 37Cl- ions were formed by 37Cl16O- molecular-dissociation before the injection magnet, resulting in -0.7% of 26Al- magnetic rigidity. Subsequently, the 37Cl4+ ions have ME/q2 value that differ from 26Al3+ by -0.1%. These allow the 37Cl - and 37Cl4+ to simultaneously pass through injection magnet, analytical magnet and high-energy analyser, and finally reach the detector with 26Al3+. Further investigations on high charge states (26Al5+ and 26Al7+) indicate that the problem of interferences is generic. That is, interferences closest to 24 MeV 26Al5+ ions include 10B 2+, 16O3+, 35Cl7+ and 37Cl7+ ions, while 32 MeV 26Al7+ ions may be interfered by 7Li2+, 16O 4+, 18O5+, 35Cl9+ and 37Cl9+. However, it remains unclear that 37Cl continuum events observed in 26Al3+-AMS do not exist in 26Al5+ and 26Al7+-AMS operations. © 2014 Elsevier B.V. All rights reserved.
AU  - Xu,S
AU  - Freeman,SPHT
AU  - Rood,DH
AU  - Shanks,RP
DO  - 10.1016/j.nimb.2014.04.009
EP  - 45
PY  - 2014///
SN  - 0168-583X
SP  - 42
TI  - <sup>26</sup>Al interferences in accelerator mass spectrometry measurements
T2  - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
UR  - http://dx.doi.org/10.1016/j.nimb.2014.04.009
VL  - 333
ER  - 

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