Abstract
We describe the nucleosynthesis of 26Al in hot-bottom burning convective envelopes of intermediate mass AGB stars. Using a schematic model of AGB star evolution, we calculate 26Al yields for AGB stars of different initial masses and metallicities, and these are employed in an equilibrium chemical evolution model. The intensity of the 1.809 MeV line emission resulting from the residual 26Al in the interstellar medium is calculated as a function of longitude in the galactic plane. Emissivity distributions corresponding to observed distributions of AGB stars and a star forming spiral galaxy describable by spiral density wave theory are considered.
