Abstract
We study interactions of cosmic ray particles with the Earth’s atmosphere and polar ice focusing on in situ formation of radiocarbon in polar ice. We calculate the production rate of the nuclide for sea level high geomagnetic latitudes using various sets of cross section data and compare our results with experimental data. The effective attenuation length of cosmic ray spallation reactions in ice is found to be 130 g/cm 2 for high geomagnetic latitudes. Accurate determination of this parameter is important for radiocarbon concentration calculations for ice samples from ablating areas of ice sheet. The recalculation of the radiocarbon production rates for different glacier elevations is discussed.
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