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The Boltzmann-Uehling-Uhlenbeck (BUU) Model, which includes the Fermi motion,the mean field, individual nucleon-nucleon (N-N) interactions and the Pauliblocking effect etc., is used to calculate the total reaction cross section$\sigma_R$ induced by $\alpha$-particles on different targets in the incidentenergy range from 17.4 to 48.1 MeV/u. The calculation result can reproduce theexperimental data well. The nucleus-nucleus interaction radius parameter $r_0$was extracted from experimental $\sigma_R$. It is found that $r_0$ becomesconstant with increasing the mass number of target.Comment: 4 pages, 4 fig

Calculation of Total Reaction Cross Sections Induced by Intermediate Energy -Particles with the Boltzmann-Uehling-Uhlenbeck Model