The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al [The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al.]
Abstract
Most accelerator mass spectrometry measurements of 26Al utilize the Al- ion despite lower source currents compared with AlO- since the stable isobar 26Mg does not form elemental negative ions. A gas-filled magnet allows sufficient suppression of 26Mg thus enabling the use of the more intense 26AlO- ion. However, most AMS systems do not include a gas-filled magnet. We therefore explored the feasibility of suppressing 26Mg by using a post-accelerator stripping foil. With this approach, combined with the use of alternative cathode matrices, we were able to suppress 26Mg by a factor of twenty. This suppression was insufficient to enable the use of 26AlO-, however further refinement of our system may permit its use in the future.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Center for Accelerator Mass Spectrometry
- Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Center for Accelerator Mass Spectrometry; Univ. of California, Santa Barbara, CA (United States). Earth Research Inst.
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1255183
- Report Number(s):
- LLNL-JRNL-485341
Journal ID: ISSN 0168-583X
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms
- Additional Journal Information:
- Journal Volume: 294; Journal Issue: C; Journal ID: ISSN 0168-583X
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; 43 PARTICLE ACCELERATORS; 07 ISOTOPES AND RADIATION SOURCES; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Accelerator mass spectrometry; Al-26; Mg suppression
Citation Formats
Tumey, Scott J., Brown, Thomas A., Finkel, Robert C., and Rood, Dylan H. The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al [The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al.]. United States: N. p., 2012.
Web. doi:10.1016/j.nimb.2012.08.040.
Tumey, Scott J., Brown, Thomas A., Finkel, Robert C., & Rood, Dylan H. The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al [The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al.]. United States. doi:10.1016/j.nimb.2012.08.040.
Tumey, Scott J., Brown, Thomas A., Finkel, Robert C., and Rood, Dylan H. Thu .
"The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al [The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al.]". United States. doi:10.1016/j.nimb.2012.08.040. https://www.osti.gov/servlets/purl/1255183.
@article{osti_1255183,
title = {The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al [The feasibility of isobaric suppression of 26Mg via post-accelerator foil stripping for the measurement of 26Al.]},
author = {Tumey, Scott J. and Brown, Thomas A. and Finkel, Robert C. and Rood, Dylan H.},
abstractNote = {Most accelerator mass spectrometry measurements of 26Al utilize the Al- ion despite lower source currents compared with AlO- since the stable isobar 26Mg does not form elemental negative ions. A gas-filled magnet allows sufficient suppression of 26Mg thus enabling the use of the more intense 26AlO- ion. However, most AMS systems do not include a gas-filled magnet. We therefore explored the feasibility of suppressing 26Mg by using a post-accelerator stripping foil. With this approach, combined with the use of alternative cathode matrices, we were able to suppress 26Mg by a factor of twenty. This suppression was insufficient to enable the use of 26AlO-, however further refinement of our system may permit its use in the future.},
doi = {10.1016/j.nimb.2012.08.040},
journal = {Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms},
number = C,
volume = 294,
place = {United States},
year = {2012},
month = {9}
}
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