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.]

Full Record
Other Related Research

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.

Copy to clipboard


                    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.

Copy to clipboard


                    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.

Copy to clipboard


                    
@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}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

DOI: 10.1016/j.nimb.2012.08.040

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Ultra-sensitive mass spectroscopy using a tandem Van de Graaff accelerator to detect /sup 10/Be and /sup 26/Al

Thesis/Dissertation Thomas, J H

/sup 10/Be and /sup 26/Al are cosmic ray produced radioactive isotopes with half lives of 1.6 x 10/sup 6/ and .72 x 10/sup 6/ years, respectively. /sup 10/Be is produced at a rate of 2.0 x 10/sup -2/ atoms/cm/sup 2//sec and /sup 26/Al is produced at a rate of about 2 x 10..pi../sup 4/ atoms/cm/sup 2//sec. /sup 10/Be and /sup 26/Al are incorporated into the geologic sediments where they can be detected and used as geochronometers. The very low concentrations of these isotopes can be detected with ..beta.. decay counters or accelerator mass spectroscopy techniques (AMS), but the AMS techniquesmore »« less
Measurement of {sup 25}Mg(p, {gamma}){sup 26}Al{sup g} resonance strengths via accelerator mass spectrometry

Journal Article Arazi, A ; Niello, J O. Fernandez ; Faestermann, T ; ... - Physical Review. C, Nuclear Physics

The strengths of resonances located at center-of-mass energies of E{sub c.m.}=189, 304, 374, and 418 keV for the {sup 25}Mg(p,{gamma}) reaction have been measured for the first time with an off-line method: Mg targets were firstly activated with protons at the resonance energies and the produced {sup 26}Al{sup g} nuclei were counted by means of highly sensitive accelerator mass spectrometry (AMS). Thus, the production of {sup 26}Al in its ground state is determined independently from the {gamma}-decay branching ratio. While the 304, 374, and 418 keV resonances show fair agreement with previous measurements, the 189 keV resonance yield a significantlymore »« less
DOI: 10.1103/PHYSREVC.74.025802
Nearly Complete Isobar Suppression by Photodetachment

Journal Article Andersson, P. ; Lindahl, A. O. ; Hanstorp, D. ; ... - Journal of Applied Physics

The efficiency of selective suppression of negative ions by photodetachment in a gas-filled radio frequency quadrupole ion cooler was investigated with a new detection method. A neodymium doped yttrium aluminum garnet laser beam at 1064 nm was used to remove Co ions in the radio frequency quadrupole cooler and the remaining ions were then probed by photodetachment and neutral particle detection. More than 99.99% suppression of the Co ions was observed. Under identical conditions, only 20% of a Ni beam was suppressed. The results demonstrate that this isobar suppression technique can lead to nearly complete elimination of certain isobaric contaminantsmore »« less
DOI: 10.1063/1.3291104
Isobar Suppression by Photodetachment in a RF Quadrupole Ion Guide

Journal Article Havener, C C ; Liu, Y ; Liang, J F ; ... - AIP Conference Proceedings

Ion beam purity is of crucial importance to experimental research in nuclear structure and nuclear astrophysics at the Holifield Radioactive Ion Beam Facility (HRIBF). Mass selected beams are often mixtures of the radioactive isotope of interest and isobaric contaminants that complicate and sometimes compromise experiment. In order to maximize the use of the large radius magnetic mass separator at HRIBF for isobaric purification, the inherent energy spread of injected beams in the 25-MV tandem electrostatic accelerator must be minimized. The development of a negative ion beam cooler based on collisional cooling in a gas-filled RF ion guide has been reportedmore »« less
DOI: 10.1063/1.2773673
Measurement of the {sup 24}Mg({sup 3}He,p){sup 26}Al cross section: Implication for {sup 26}Al production in the early solar system

Journal Article Fitoussi, C ; Duprat, J ; Tatischeff, V ; ... - Physical Review. C, Nuclear Physics

The nucleosynthetic origin of {sup 26}Al (t{sub 1/2}=0.72 Myr) in the early solar system is still an open question. Several models predict that short-lived radionuclides could be produced by irradiation of circumsolar material by light charged particles emitted by the young sun. Within some models, most of the {sup 26}Al is produced by {sup 3}He-induced reactions on {sup 24}Mg. Little experimental data exist on {sup 3}He reactions so that irradiation models have had to rely on theoretical cross sections deduced from statistical nuclear reaction codes. We performed a direct measurement of the {sup 26}Al production on Mg target by meansmore »« less
DOI: 10.1103/PHYSREVC.78.044613

Similar Records

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.]