EMISSION OF CHARGED-PARTICLES IN THE ANNIHILATION OF STOPPED ANTIPROTONS ON HEAVY PHOTOEMULSION NUCLEI

Experimental data on the annihilation of stopped antiprotons on photoe mulsion nuclei are analyzed for the emission of a single charged secon dary. Six one-prong stars featuring black particles with nearly equal ranges in emulsion (79.4 +/- 5.1 mu m on average) are found. That the ranges of these black particles are nearly equal suggests that proton annihilation is followed by the evaporation of an a particle from the excited residual nucleus. The branching ratio of the detected events i s not less than (1.3 +/- 0.6) x 10(-3).