CORRELATION BETWEEN ELECTRON EMISSION AND FRAGMENTATION INTO IONS FOLLOWING B 1s EXCITATION OF THE BCl_3 MOLECULE Y. Shimizu$^\ast$, K. Ueda$^\ast$, H. Chiba$^\ast$, Y. Sato$^\ast$, M. Kitajima$^\dagger$ and H. Tanaka$^\dagger$ $^\ast$Research Institute for Scientific Measurements, Tohoku University, Sendai 980-8577, Japan $^\dagger$Department of Physics, Sophia University, Tokyo 102-8554, Japan Using the energy-selected-electron--energy-selected ion coincidence method, we have confirmed that the energetic Cl^+ and BCl^+ ions are ejected within the molecular plane at the B 1s \to 4e' excitation of BCl_3 and that the energetic B^+ ions are ejected in an out-of-plane direction at B 1s \to 2a_2''.