The 25Mg(p, γ)26Al reaction at low astrophysical energies

Authors :: 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.
Source :: Physics Letters B. Jan2012, Vol. 707 Issue 1, p60-65. 6p.
Publication Year :: 2012
Abstract: Abstract: In the present work we report on a new measurement of resonance strengths ωγ in the reaction 25Mg(p, γ)26Al at and 189 keV. This study was performed at the LUNA facility in the Gran Sasso underground laboratory using a 4π BGO summing crystal. For the first time the 92 keV resonance was directly observed and a resonance strength was determined. Additionally, the γ-ray branchings and strength of the 189 keV resonance were studied with a high resolution HPGe detector yielding an ωγ value in agreement with the BGO measurement, but 20% larger compared to previous works. [Copyright &y& Elsevier]