CLASSICAL TRAJECTORY CALCULATIONS OF COLLISION ENERGY DEPENDENCE OF PARTIAL PENNING IONIZATION CROSS SECTIONS Tetsuji Ogawa and Koichi Ohno Department of Chemistry, Graduate School of Science, Tohoku University, Miyagi, Japan Classical trajectory calculations are performed for the Penning ionization of several molecular target systems. Anisotropic model potentials are adopted to calculate the ionization cross section. Results of the calculations are compared with experimental results of collision energy dependence of partial ionization cross sections. Abstract (Postscript format)