Measurements of 36Cl with a gas-filled magnet at the Uppsala tandem laboratory

V. Alfimov; G. Possnert; A. Aldahan

doi:10.1016/j.nimb.2007.01.188

Measurements of ³⁶Cl with a gas-filled magnet at the Uppsala tandem laboratory

V. Alfimov, G. Possnert, A. Aldahan

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The performance of a gas-filled magnet combined with a gas ionization detector for measurements of ³⁶Cl was systematically studied at the Uppsala tandem laboratory. Our tests were conducted at a terminal voltage of 4.6 MV using gas-foil stripping and a 37 MeV ³⁶Cl⁺⁷ ion beam. An optimal suppression of the interfering isobar ³⁶S in the stand-alone gas-filled magnet (2 mbar N₂ gas pressure) was found to be ≥300, and an additional ≥300 times reduction was achieved by the E_residual signal of the two-anode gas ionization detector. The overall suppression in the order of ≥10⁵ permits analysis of samples with a sulfur content of ≤5 ppm and ³⁶Cl/Cl ratios of ≥10^-15. We have successfully measured samples with ³⁶Cl/Cl ratios in the range of 10^-12-10^-15 demonstrating the use of a medium-sized tandem accelerator system (∼1 MeV/amu) for ³⁶Cl AMS.

Original language	English
Pages (from-to)	199-203
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	259
Issue number	1
DOIs	https://doi.org/10.1016/j.nimb.2007.01.188
Publication status	Published - Jun 1 2007
Externally published	Yes

Keywords

Accelerator mass spectrometry (AMS)
Chlorine-36
Gas ionization detector
Gas-filled magnet
Isobar separation

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nimb.2007.01.188

Cite this

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title = "Measurements of 36Cl with a gas-filled magnet at the Uppsala tandem laboratory",

abstract = "The performance of a gas-filled magnet combined with a gas ionization detector for measurements of 36Cl was systematically studied at the Uppsala tandem laboratory. Our tests were conducted at a terminal voltage of 4.6 MV using gas-foil stripping and a 37 MeV 36Cl+7 ion beam. An optimal suppression of the interfering isobar 36S in the stand-alone gas-filled magnet (2 mbar N2 gas pressure) was found to be ≥300, and an additional ≥300 times reduction was achieved by the Eresidual signal of the two-anode gas ionization detector. The overall suppression in the order of ≥105 permits analysis of samples with a sulfur content of ≤5 ppm and 36Cl/Cl ratios of ≥10-15. We have successfully measured samples with 36Cl/Cl ratios in the range of 10-12-10-15 demonstrating the use of a medium-sized tandem accelerator system (∼1 MeV/amu) for 36Cl AMS.",

keywords = "Accelerator mass spectrometry (AMS), Chlorine-36, Gas ionization detector, Gas-filled magnet, Isobar separation",

author = "V. Alfimov and G. Possnert and A. Aldahan",

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T1 - Measurements of 36Cl with a gas-filled magnet at the Uppsala tandem laboratory

AU - Alfimov, V.

AU - Possnert, G.

AU - Aldahan, A.

PY - 2007/6/1

Y1 - 2007/6/1

N2 - The performance of a gas-filled magnet combined with a gas ionization detector for measurements of 36Cl was systematically studied at the Uppsala tandem laboratory. Our tests were conducted at a terminal voltage of 4.6 MV using gas-foil stripping and a 37 MeV 36Cl+7 ion beam. An optimal suppression of the interfering isobar 36S in the stand-alone gas-filled magnet (2 mbar N2 gas pressure) was found to be ≥300, and an additional ≥300 times reduction was achieved by the Eresidual signal of the two-anode gas ionization detector. The overall suppression in the order of ≥105 permits analysis of samples with a sulfur content of ≤5 ppm and 36Cl/Cl ratios of ≥10-15. We have successfully measured samples with 36Cl/Cl ratios in the range of 10-12-10-15 demonstrating the use of a medium-sized tandem accelerator system (∼1 MeV/amu) for 36Cl AMS.

AB - The performance of a gas-filled magnet combined with a gas ionization detector for measurements of 36Cl was systematically studied at the Uppsala tandem laboratory. Our tests were conducted at a terminal voltage of 4.6 MV using gas-foil stripping and a 37 MeV 36Cl+7 ion beam. An optimal suppression of the interfering isobar 36S in the stand-alone gas-filled magnet (2 mbar N2 gas pressure) was found to be ≥300, and an additional ≥300 times reduction was achieved by the Eresidual signal of the two-anode gas ionization detector. The overall suppression in the order of ≥105 permits analysis of samples with a sulfur content of ≤5 ppm and 36Cl/Cl ratios of ≥10-15. We have successfully measured samples with 36Cl/Cl ratios in the range of 10-12-10-15 demonstrating the use of a medium-sized tandem accelerator system (∼1 MeV/amu) for 36Cl AMS.

KW - Accelerator mass spectrometry (AMS)

KW - Chlorine-36

KW - Gas ionization detector

KW - Gas-filled magnet

KW - Isobar separation

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