The role of gravitational supernovae on the galatic evolution of the LiBeB isotopes

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  • 20 March 1998
Abstract
The observed Be and B relationships with metallicity clearly supports the idea that both elements have a primary origin and that are produced by the same class of objects. Spallation by particles accelerated during gravitational supernova events (SNII, SNIb/c) seems to be a likely origin. We show, in the context of a model of chemical evolution, that it is possible to solve the Li, Be and B abundance puzzle with the yields recently proposed by Ramaty et al. (1997) provied SNII are unable to significantly accelerate helium nuclei, spallation reactions occurs in a CO-rich ambient medium around gravitational supernovae and different mechanism are allowed to act simultaneously.

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