- Conference date: 8−13 Jul 1994
- Location: Assergi, Italy
In previous contributions we have shown that copious amounts of LiBeB are likely to be produced in Orion at the present time, as witnessed by the high flux of gamma‐rays it radiates (1,2). It is shown here that spallation of fast nuclei within molecular clouds surrounding the regions of formation of massive stars, alone, could govern the behavior of light species in the early galaxy (up to [Fe/H]=−1). Afterwards two other processes, already identified, combine with the first one to build the abundances observed in the Solar System and the present interstellar medium: i) standard galactic cosmic rays interactions with ISM and ii) 7Li formation by slowly evolving stars or binary systems (low mass AGB and/or novae). This new model reproduces simply and elegantly all the elemental and isotopic abundances of light elements as observed in the Solar System, including 11B/10B, together with their evolution.
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