Show simple item record Valle, Giada Ferrini, Federico Galli, Daniele Shore, Steven N. 2021-06-23T15:13:34Z 2021-06-23T15:13:34Z 2001-10
dc.identifier.citation Valle, G., Ferrini, F., Galli, D., & Shore, S. N. (2002). Evolution of Li, Be, and B in the Galaxy. The Astrophysical Journal, 566, 252–260.
dc.description.abstract In this paper we study the production of Li, Be and B nuclei by Galactic cosmic ray spallation processes. We include three kinds of processes: (i ) spallation by light cosmic rays impinging on interstellar CNO nuclei (direct processes); (ii ) spallation by CNO cosmic ray nuclei impinging on interstellar p and 4He (inverse processes); and (iii ) α–α fusion reactions. The latter dominate the production of 6,7Li. We calculate production rates for a closed-box Galactic model, verifying the quadratic dependence of the Be and B abundances for low values of Z. These are quite general results and are known to disagree with observations. We then show that the multi-zone multi-population model we used previously for other aspects of Galactic evolution produces quite good agreement with the linear trend observed at low metallicities without fine tuning. We argue that reported discrepancies between theory and observations do not represent a nucleosynthetic problem, but instead are the consequences of inaccurate treatments of Galactic evolution. en
dc.format.extent 27 pages
dc.format.mimetype PDF
dc.language.iso en en
dc.publisher American Astronomical Society en
dc.subject.lcsh Astrophysics
dc.subject.lcsh Galactic cosmic rays
dc.title Evolution of Li, Be and B in the Galaxy en
dc.type Article en

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