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

V. Alfimov, G. Possnert, A. Aldahan

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9 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number1
Publication statusPublished - Jun 2007
Externally publishedYes


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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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