کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5467476 | 1398937 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Accelerator mass spectrometry of 26Al at 6Â MV using AlOâ ions and a gas-filled magnet
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
For accelerator mass spectrometry (AMS) measurements of 26Al the use of AlOâ ions holds considerable promise given their ionization yield which is about an order of magnitude higher compared to the commonly used Alâ ions. However, the strong isobaric interference introduced by 26MgOâ ions must be reduced before the identification in a gas ionization chamber (GIC). At the ETH Zurich 6 MV EN-TANDEM accelerator the foil degrader method as well as the gas-filled magnet (GFM) method were systematically investigated with respect to suppression of 26Mg and acceptance of 26Al. Additionally a new, large-acceptance GIC was designed to capture as large a fraction of the broad beams as possible. The GFM method achieves a 26Mg suppression factor of 103 and an acceptance of 26Al of >50% and therefore provides a significant advantage over the degrader foil method (sFoil(26Mg)â3·102,ÏFoil(26Al)â30%). In combination with the 26Mg separation of 104 in the GIC it is now possible to measure samples with a Mg content in the ppm range down to 26Al/27Al â10-14 with an overall efficiency that is approximately 5à improved with respect to the previous TANDEM setup.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 406, Part A, 1 September 2017, Pages 272-277
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 406, Part A, 1 September 2017, Pages 272-277
نویسندگان
Klaus-Ulrich Miltenberger, Arnold Milenko Müller, Martin Suter, Hans-Arno Synal, Christof Vockenhuber,