Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1685892 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2008 | 7 Pages |
Abstract
We present a modification to the 14C-dedicated SMCAMS (Shanghai mini-cyclotron based AMS) system to allow the measurement of 26Al for biomedical applications with the existing devices. This is accomplished by determining the turn number, harmonic number and RF frequency theoretically and then making the appropriate orbit programming and beam optics calculation and experimental adjustments. The tests were conducted using pencil graphite (for the carbon pilot beam), Al2O3 powder and metal aluminum to accelerate ions with mass number of 24, 25, 26 and 27. The frequency response curves for those ions are shown. Finally, the Al2O3 standard sample with a known isotope ratio of 1.0Â ÃÂ 10â10 is measured. The 26Alâ ions are detected and its frequency response curve shows the peak of 26Alâ though very weak is well separated from the most neighboring interfering molecular ions 25MgHâ.
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Authors
Shengli Wang, Yonghao Liu, Deming Li, Maobai Chen,