부산대학교 도서관

We present a model for the calculation of the production rates of cosmogenic nuclides in extraterrestrial material. The model is based on the Monte Carlo simulation software Geant4. Using this software an application simulating the irradiation of the spherical body with predefined chemical composition by galactic cosmic-ray protons was developed. The fluxes of secondary neutrons and protons generated within the body of the sample are calculated. These are further used for the calculation of the production rates for cosmogenic nuclides. The plausibility of the presented model was tested in case of the well-studied meteoritic sample Knyahinya for which the production rates of cosmogenic nuclides were previously measured and also calculated using MCNP simulation software. The production rates for 3He, 10Be, 21Ne, 22Ne, 26Al, 36Cl, 38Ar, 39Ar, 41Ca and 53Mn have been calculated in Knyahinya meteorite and for 10Be, 26Al and 36Cl in Apollo 17 sample 73,002. [ABSTRACT FROM AUTHOR]