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26Al + p elastic and inelastic scattering reactions and galactic abundances of 26Al

Publication Type
Journal
Journal Name
Physical Review C
Publication Date
Volume
85
Issue
6
Conference Date
-

Galactic 26Al is the first radioactive nucleus to be positively identified by gamma-ray astronomy with detection of the 1.809 MeV gamma ray associated with its decay. This nucleus is destroyed in astrophysical environments in the 26Al(p,gamma)27Si and inelastic 26Al+p scattering reactions where properties of 27Si levels determine reaction rates. To investigate these properties, elastic and inelastic 26Al+p scattering reactions were measured between Ec.m. = 0.5 - 1.5 MeV at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory (ORNL). A candidate for a new resonance in the 26Al(p,gamma)27Si reaction was identified. Upper limits were also set on the strengths of postulated resonances and on the cross section of the inelastic reaction, but there is little effect on current reaction rate calculations