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Measurement of 25Mg(p; gamma)26Al resonance strengths via gamma spectrometry

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arxiv 0710.4206 v1 pith:RTXX7WIL submitted 2007-10-23 nucl-ex

Measurement of 25Mg(p; gamma)26Al resonance strengths via gamma spectrometry

A. Formicola , A. Best , G. Imbriani , M. Junker , D. Bemmerer , R. Bonetti , C. Broggini , A. Caciolli
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F. Confortola P. Corvisiero H. Costantini Z. Elekes Zs Fulop G. Gervino A. Guglielmetti Gy Gyurky C. Gustavino A. Lemut B. Limata M. Marta C. Mazzocchi R. Menegazzo P. Prati V. Roca C. Rolfs C. Rossi Alvarez E. Somorjai O. Straniero F. Strieder F. Terrasi H. P. Trautvetter
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The COMPTEL instrument performed the first mapping of the 1.809 MeV photons in the Galaxy, triggering considerable interest in determing the sources of interstellar 26Al. The predicted 26Al is too low compared to the observation, for a better understanding more accurate rates for the 25Mg(p; gamma)26Al reaction are required. The 25Mg(p;gamma)26Al reaction has been investigated at the resonances at Er= 745; 418; 374; 304 keV at Ruhr-Universitat-Bochum using a Tandem accelerator and a 4piNaI detector. In addition the resonance at Er = 189 keV has been measured deep underground laboratory at Laboratori Nazionali del Gran Sasso, exploiting the strong suppression of cosmic background. This low resonance has been studied with the 400 kV LUNA accelerator and a HPGe detector. The preliminary results of the resonance strengths will be reported.

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