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.

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

LIMATA, BENEDICTA NORMANNA;IMBRIANI, GIANLUCA;BEST, ANDREAS;DI LEVA, ANTONINO;ROCA, VINCENZO;
2012

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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/483157
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