Thick target yields of 26Alg.s. from the 16O(16O,x)26Alg.s. and 16O(14N,x)26Alg.s. reactions

Extending the earlier work of Bateman et al., we have measured the energy-integrated yield of 26Alg.s. from the 16O(16O,x)26Alg.s. and 16O(14N,x)26Alg.s. reactions. We find that although the yield from the 16O(16O,x)26Alg.s. reaction is several times larger than from the 12C(16O,x)26Alg.s. reaction, the abundance of fossil 26Alg.s. observed in carbonaceous chondrite meteorites could be produced by oxygen-rich cosmic rays via the 16O(16O,x)26Alg.s. reaction only under the improbable scenario that more than 40% of the solar system oxygen was injected into the protosolar nebula as cosmic rays.