Direct measurement of the (23)Na(α,p)(26)Mg reaction cross section at energies relevant for the production of galactic (26)Al.
The 1809-keV γ ray from the decay of (26)Al(g) is an important target for γ-ray astronomy. In the convective C/Ne burning shell of massive presupernova stars, the (23)Na(α,p)(26)Mg reaction directly influences the production of (26)Al. We have performed a direct measurement of the (23)Na(α,p)(26)Mg reaction cross section at the appropriate astrophysically important energies. The stellar rate calculated in the present work is larger than the recommended rate by nearly a factor of 40 and could strongly affect the production of (26)Al in massive stars.
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Almaraz-Calderon
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Bertone
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Alcorta
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Albers
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
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Deibel
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Hoffman
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Jiang
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Marley
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Rehm
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA and Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, USA.
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Ugalde