| Spallation reactions play a role in the production of isotopes in meteorites by Galactic cosmic ray (GCR) particles. For several decades cosmogenic nuclide production rates have been measured in different types of meteorites and calculation models have been improved. The main microscopic ingredients of these models are: i) the particle fluxes responsible of the nuclide production (primary and secondary particles) and ii) the production cross-section of nuclides from a given particle (in the whole energy range). Up to now the best choice seems to compute the particle fluxes with Monte-Carlo codes and to use experimental measurement for the production cross sections, if available.
Meanwhile spallation models have also been improved, especially the combination INCL4-Abla. New versions of these combined models have been recently benchmarked within the \"Benchmark of spallation models\" carried out by IAEA and it comes out that INCL4.5-Abla07 is one of the best combinations to describe spallation reactions.
In this paper we will show, with microscopic excitation functions, the significant improvement brought in the estimates of nuclides of interest in stony and iron meteorites (10Be, 53Mn, 59Ni, ...) by these models. |
