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.]

doi:10.1016/j.nimb.2012.08.040

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.]

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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:

Tumey, Scott J. ^[1]; Brown, Thomas A. ^[1]; Finkel, Robert C. ^[2]; Rood, Dylan H. ^[3]

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:: 2012-09-13

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.

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                    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.

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                    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.

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@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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DOI: 10.1016/j.nimb.2012.08.040

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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.]

Abstract

Citation Formats

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.]