The COMPTEL instrument performed the first mapping of the 1.809 MeV photons in the Galaxy, triggering considerable interest in determining 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, γ)26Al reaction are required. The 25Mg(p, γ)26Al reaction has been investigated at the resonances at* Er = 745, 418, 374, and 304 keV at Ruhr-Universität-Bochum using a Tandem accelerator and a 4π NaI detector. In addition, the resonance at Er = 189 keV has been measured deep underground at Laboratori Nazionali del Gran Sasso, exploiting the strong suppression of a cosmic background. This low resonance has been studied with the 400 kV LUNA accelerator and an HPGe detector. The preliminary results of the resonance strengths will be reported.
Measurement of 25Mg(p,γ)26Al resonance strengths via gamma spectrometry / A. Formicola, A. Best, G. Imbriani, M. Junker, D. Bemmerer, R. Bonetti, C. Broggini, A. Caciolli, F. Confortola, P. Corvisiero, H. Costantini, Z. Elekes, Z. Fulop, G. Gervino, A. Guglielmetti, G. Gyürky, 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. - In: JOURNAL OF PHYSICS. G, NUCLEAR AND PARTICLE PHYSICS. - ISSN 0954-3899. - 35:1(2008 Jan), pp. 014013.014013.1-014013.014013.5.
Measurement of 25Mg(p,γ)26Al resonance strengths via gamma spectrometry
R. Bonetti;A. Guglielmetti;C. Mazzocchi;
2008
Abstract
The COMPTEL instrument performed the first mapping of the 1.809 MeV photons in the Galaxy, triggering considerable interest in determining 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, γ)26Al reaction are required. The 25Mg(p, γ)26Al reaction has been investigated at the resonances at* Er = 745, 418, 374, and 304 keV at Ruhr-Universität-Bochum using a Tandem accelerator and a 4π NaI detector. In addition, the resonance at Er = 189 keV has been measured deep underground at Laboratori Nazionali del Gran Sasso, exploiting the strong suppression of a cosmic background. This low resonance has been studied with the 400 kV LUNA accelerator and an HPGe detector. The preliminary results of the resonance strengths will be reported.
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