DETERMINATION OF THE GALAXY AGE ON THE BASIS OF URANIUM-THORIUM ISOTOPIC RELATIONS AND GALAXY NUCLEOSYNTHESIS MODEL

摘要

In present report we discuss the dependence of Galaxy age, which can be defined on the basis of galactic nucleosynthesis by method of thorium and uranium isotopic relations, and scenario conditions of heavy nuclei nucleosynthesis. It was shown that Galaxy age strongly depend on the r-process scenario, its nuclear data input and on parameters of galactic nucleosynthesis as well. The influence of additional nucleosynthesis spike close to proto-solar cloud was defined. The tolerance range for nuclei-cosmochronometers abundances ratios and parameters of galactic nucleosynthesis are discussed.