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

F Strieder,A Lemut,H Costantini,Gy Gyürky,A Guglielmetti,A Formicola,R Menegazzo,C Broggini,Z Elekes,M Junker,C Rossi Alvarez,B Limata,O Straniero,P Corvisiero,A Caciolli,F Terrasi,C Rolfs,Zs Fülöp,C Mazzocchi,G Gervino,D Bemmerer,P Prati,C Gustavino,V Roca,E Somorjai,M Marta,G Imbriani,A Best,A Di Leva ,H P Trautvetter

doi:10.1016/j.physletb.2011.12.029

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

F Strieder, A Lemut + Show 28 more

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https://doi.org/10.1016/j.physletb.2011.12.029

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Journal: Physics Letters B	Publication Date: Dec 16, 2011
Citations: 65	License type: other-oa

Affiliation: Ruhr University Bochum, University of Genoa, INFN Sezione di Genova, HUN-REN Institute for Nuclear Research, University of Milan, INFN Sezione di Milano, Gran Sasso National Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, INFN Sezione di Padova, INFN Sezione di Napoli, INFN Sezione di Torino, University of Turin

#Gran Sasso Underground Laboratory #Γ-ray Branchings + Show 8 more

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Abstract

In the present work we report on a new measurement of resonance strengths ωγ in the reaction 25Mg(p, γ)26Al at Ecm=92 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 ωγ=(2.9±0.6)×10−10 eV 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.

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