Modulation of the cosmogenic nuclide production expected from the galactovertical motion of the solar system

A variable cosmogenic-production rate model is proposed which takes account of the changes in galactic-cosmic-ray irradiation conditions arising from the vertical oscillation of the solar system about the galactic plane. The model incorporates and substantiates several ideas and suggestions previously put forward in the literature. The time distribution of the10Be concentration predicted by the model appears to be consistent with the data of the deep-sea sediment core RC 12-65. A comparison of our model with the conventional constant-production rate model is carried out, especially with reference to time-integrated concentrations in meteorites.