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.]

Tumey, Scott J.; Brown, Thomas A.; Finkel, Robert C.; Rood, Dylan H.

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.]

Journal Article · Thu Sep 13 00:00:00 EDT 2012 · Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

DOI:https://doi.org/10.1016/j.nimb.2012.08.040· OSTI ID:1255183

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.

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.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1255183

Report Number(s):: LLNL-JRNL-485341

Journal Information:: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 294, Issue C; ISSN 0168-583X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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References (8)

26Al measurements with 10Be counting statistics Fifield, L. K.; Tims, S. G.; Gladkis, L. G. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 259, Issue 1 https://doi.org/10.1016/j.nimb.2007.01.156	journal	June 2007
Magnesium suppression for 26Al measurements using AlO− ions Arazi, A.; Faestermann, T.; Fernández Niello, J. O. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 223-224 https://doi.org/10.1016/j.nimb.2004.04.052	journal	August 2004
Srim-2003 Ziegler, James F. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 219-220 https://doi.org/10.1016/j.nimb.2004.01.208	journal	June 2004
Performance of the HVE 5MV AMS system at CEREGE using an absorber foil for isobar suppression Klein, M. G.; Gottdang, A.; Mous, D. J. W. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 8 https://doi.org/10.1016/j.nimb.2007.11.077	journal	April 2008
The French accelerator mass spectrometry facility ASTER: Improved performance and developments Arnold, Maurice; Merchel, Silke; Bourlès, Didier L. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12 https://doi.org/10.1016/j.nimb.2010.02.107	journal	June 2010
Semi-empirical formulas for heavy-ion stripping data Sayer, R. O. Revue de Physique Appliquée, Vol. 12, Issue 10 https://doi.org/10.1051/rphysap:0197700120100154300	journal	January 1977
The new LLNL AMS spectrometer Southon, J. R.; Caffee, M. W.; Davis, J. C. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 52, Issue 3-4 https://doi.org/10.1016/0168-583X(90)90426-U	journal	December 1990
Empirical formulae for energy loss straggling of ions in matter Yang, Q.; O'Connor, D. J.; Wang, Zhonglie Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 61, Issue 2 https://doi.org/10.1016/0168-583X(91)95454-L	journal	August 1991

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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.]

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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.]