Resonance strength measurements and thermonuclear reaction rates for 25Mg(p, γ)26Al (II) |
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Authors: | M.R. Anderson L.W. Mitchell M.E. Sevior S.R. Kennett D.G. Sargood |
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Affiliation: | School of Physics, University of Melbourne, Parkville, Victoria 3052, Australia |
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Abstract: | The strengths of resonances in have been measured in the energy range Ep = 600–1730 keV. Several serious disagreements with previously published results are reported. Thermonuclear reaction rates are calculated for the temperature range (0.5–10) × 109 K for production of 26Al in its ground state and in its isomeric first excited state. Total thermonuclear reaction rates are compared with those calculated from statistical-model cross sections and, even in energy ranges where the experimental cross section derives from widely spaced resonances, the agreement is very good. The establishment of a thermal population of 26Al excited states in a stellar environment is discussed, with both electromagnetic transitions and proton inelastic and superelastic scattering as the thermalising processes. |
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Keywords: | Nuclear reaction |
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