Tandem accelerator mass spectrometry of 26Al from an iron meteorite

J. Thomas, P. Parker, Gregory Herzog, D. Pal

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Abstract

The Yale tandem Van de Graaff accelerator was used as a mass spectrometer to detect 26Al. The ion source was modified by the addition of a Pierce electrode and the source was operated with a reflected cesium beam geometry utilizing ∼ 1 mg samples of Al2O3. An electrostatic analyzer was installed after the analyzing magnet in order to separate the Al5+ beam from various background beams. We were able to detect 26Al in Al extracted from the iron meteorite Mundrabilla. The measured 26Al/27Al ratios ranged from 1 × 10-12 to 1 × 10-9 atoms/atom. Using the model of Hampel et al., we have determined the exposure age of Mundrabilla to be 220±60 million years. This age agrees fairly well with the exposure age as determined with 53Mn and 38Ar.

Original languageEnglish (US)
Pages (from-to)511-518
Number of pages8
JournalNuclear Instruments and Methods In Physics Research
Volume211
Issue number2-3
DOIs
StatePublished - Jun 15 1983

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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