Abstract:
The mass spectrum of the products of arc discharge in helium between graphite electrodes has been studied for various values of the gas flow rate. As the gas flow rate increases, the intensity of C$^\pm_{60}$, C $^\pm_{70}$, C$^\pm_{84}$ and C$^\pm_{90}$ fullerene peaks increases and that of the C$^-_2$ and C$^+_3$ cluster radicals decreases, but the total decay in radicals amounts to only 21% of the total growth of fullerenes. From this it follows that a contribution to the formation of fullerenes from the neutral clusters (which are taken into account for the first time) significantly exceeds the contribution due to small radical species.