Abstract
o-stars in photographic plates are classified into those originated from heavy and light nuclei. The branching ratio of disintegration modes, the a-j ratio, and the energy distribution of emitted particles are measured for light stars. Foilowing characteristic features of light stars are ascertained; 1) the large prong number, 2) the large a-p ratio, 3) the low kinetic energy of emitted particles, and 4) the frequent emission of heavy fragments. The disintegration of 0 2 into two a-particles and a proton are studied in detail, and the possible emission of BeB nuclei is discussed. It turns out to be the main disintegration mode, that the rcst energy of o-meson is primarily shared among only a few member of nucleons and the residual part ramains in a similar to the excited levels appeared in low energy reactions.
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