The 25Mg(p,g)Al reaction at low astrophysical energies

Authors :: Luna, Collaboration
Strieder, F.
Limata, B.
Formicola, A.
Imbriani, G.
Junker, M.
Bemmerer, D.
Best, A.
Broggini, C.
Caciolli, A.
Corvisiero, P.
Costantini, H.
Dileva, A.
Elekes, Z.
Fülöp, Zs
Gervino, G.
Guglielmetti, A.
Gustavino, C.
Gyürky, Gy
Lemut, A.
Marta, M.
Mazzocchi, C.
Menegazzo, R.
Prati, P.
Roca, V.
Rolfs, C.
Rossi Alvarez, C.
Somorjai, E.
Oscar Straniero
Terrasi, F.
Trautvetter, H. P.
Source :: NASA Astrophysics Data System
Publication Year :: 2011
Publisher :: arXiv, 2011.
Abstract: In the present work we report on a new measurement of resonance strengths in the reaction 25Mg(p,gamma)26Al at E_cm= 92 and 189 keV. This study was performed at the LUNA facility in the Gran Sasso underground laboratory using a 4pi BGO summing crystal. For the first time the 92 keV resonance was directly observed and a resonance strength omega-gamma=(2.9+/-0.6)x10E-10 eV was determined. Additionally, the gamma-ray branchings and strength of the 189 keV resonance were studied with a high resolution HPGe detector yielding an omega-gamma value in agreement with the BGO measurement, but 20% larger compared to previous works.<br />Comment: 6 pages, 4 figures, accepted for publication in Physics Letters B