Curious case of 26Al accelerator mass spectrometry
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Date
2019-09-09
Authors
Journal Title
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Publisher
Australian National University
Abstract
Accelerator mass spectrometry measurement of 26Al suffers from low negative ionisation yield that often becomes the limiting factor. To counter the low Al− yield it has been recognised that AlO− produces negative ions much more efficiently and is a potential avenue to improve the measurement precision. When using AlO− for the measurement there is an additional challenge to separate the interfering isobar 26Mg and 26Al, but this can be achieved effectively with gas-filled magnet. However, this seemingly neat solution of using AlO− instead Al− for the measurement does not necessarily yield as clear cut improvements in precision as one would hope. To illustrate this point, data from conventional measurement method at ANSTO is presented and benchmarked against published data using AlO− method
Description
Keywords
Accelerators, Accuracy, Aluminium 26, ANSTO, Ionization, Magnesium 26, Mass spectroscopy, N*baryons
Citation
Wilcken, K. M., & Rood, D. H. (2019). Curious case of 26Al accelerator mass spectrometry. Paper presented to the Heavy Ion Accelerator Symposium on Fundamental and Applied Science - 2019, 9-13 September 2019, Department of Nuclear Physics, Australian National University, Canberra, Australia, (pp. 76). Retrieved from: http://hias.anu.edu.au/2019/_files/2019_HIAS_BookOfAbstracts.pdf