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 / F., S., Limata, B.N., A., F., Imbriani, G., M., J., D., B., Best, A., C., B., A., C., P., C., H., C., DI LEVA, A., Z., E., Fülöp, Z.s., G., G., A., G., C., G., Gyürky, G.y., A., L., M., M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 707:(2012), pp. 60-65. [10.1016/j.physletb.2011.12.029]

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.
2012
The 25Mg(p, gamma)26Al reaction at low astrophysical energies / F., S., Limata, B.N., A., F., Imbriani, G., M., J., D., B., Best, A., C., B., A., C., P., C., H., C., DI LEVA, A., Z., E., Fülöp, Z.s., G., G., A., G., C., G., Gyürky, G.y., A., L., M., M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 707:(2012), pp. 60-65. [10.1016/j.physletb.2011.12.029]
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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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