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The COMPTEL instrument performed the first mapping of the 1.809 MeV photonsin the Galaxy, triggering considerable interest in determing the sources ofinterstellar 26Al. The predicted 26Al is too low compared to the observation,for a better understanding more accurate rates for the 25Mg(p; gamma)26Alreaction are required. The 25Mg(p;gamma)26Al reaction has been investigated atthe resonances at Er= 745; 418; 374; 304 keV at Ruhr-Universitat-Bochum using aTandem accelerator and a 4piNaI detector. In addition the resonance at Er = 189keV has been measured deep underground laboratory at Laboratori Nazionali delGran Sasso, exploiting the strong suppression of cosmic background. This lowresonance has been studied with the 400 kV LUNA accelerator and a HPGedetector. The preliminary results of the resonance strengths will be reported.

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