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"Magnesium Suppression for 26Al Measurements using AlO- ions"
A. Arazi, T. Faestermann, J.O. Fernández Niello, D. Frischke, K. Knie, G. Korschinek, H.J. Maier, E. Richter, G. Rugel and A. Wallner
Proc. of the "9th International Conference on Accelerator Mass Spectrometry", Nagoya, Japan, September 9-13, 2002. Ed. T. Nakamura, K. Kobayashi, H. Matsuzaki, M. Murayama, Y. Nagashima, H. Oda, Y. Shibata, Y. Tanaka and M. Furukawa
Nucl. Instrum. Meth. B 223-224 (2004) 259-262
Measuring the resonance strengths of the 25Mg(p,γ)26Al reaction at energies of astrophysical interest poses a very difficult task for the usual prompt γ-ray detection method. Here we describe an alternative method in which targets are first irradiated and the produced 26Al nuclei are off-line counted by means of AMS. An overall efficiency of few times 10-5 could be achieved extracting AlO- from the ion source. For this purpose, a careful chemical treatment of the samples and the use of a gas filled magnet were necessary.
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