Characterization with a nitrogen laser of a small size RPC

We present some results from the study of a small size RPC filled with a ternary gas mixture (94.3% C2H2F4, 5% C4H10, 0.3% SF6), by measuring gas properties like the electrons drift velocity. A pulsed UV laser is focused inside the gas gap to induce ionization via double photon ionization processes. Results for drift velocity as a function of the applied electric field are presented and discussed

An upper limit for the radiative decay width of the J/?? resonance into ?????(958)+??

We present the results of a search performed at ADONE for the reaction e ++e -???J/??????????(958)+??. No evidence was found for such a reaction. The upper limit for the decay is {Mathematical expression} keV (90% CL). © 1977 Società Italiana di Fisica