That is an interesting idea: if the solar system's initial 26Al inventory was produced by cosmic-rays (from a ~1 pc supernova (SN); as opposed to being actual SN debris), you'd expect cosmic-ray effects in other elements too (e.g., Ne - and we see that, occasionally!), and perhaps a conc. gradient?
Cosmic-Ray Bath in a Past Supernova Gives Birth to Earth-Like Planets
A key question in astronomy is how ubiquitous Earth-like rocky planets are. The formation of terrestrial planets in our solar system was strongly influenced by the radioactive decay heat of short-live...
